the present invention is carried out , for example , in such a manner that the herbicidal benzoylpyrazole compound is formulated by using various additives , and the formulation is diluted with e . g . water together with the activity - improving component and applied to undesired plants or to a place where they grow . further , the present invention is carried out in such a manner that the herbicidal benzoylpyrazole compound and the activity - improving component are formulated together by using various additives , and the formulation diluted with e . g . water or without being diluted is applied to undesired plants or to a place where they grow . in the above formula ( i ), the alkyl or the alkyl moiety has from about 1 to about 6 carbon atoms , may be either linear or branched , and may , for example , be specifically methyl , ethyl , propyl , butyl , tert - butyl , pentyl or hexyl . as the herbicidal benzoylpyrazole compound , for example , compounds as shown in table 1 may be mentioned . in table 1 , no . represents the compound number , me a methyl group , et an ethyl group and bu ( t ) a tertiary butyl group . these compounds are known compound disclosed in wo2007 / 069771 , wo2008 / 065907 , wo2008 / 078811 or wo2009 / 142318 . the salt contained in the herbicidal benzoylpyrazole compound may be any salt so long as it is agriculturally acceptable , and it may , for example , be specifically an alkali metal salt such as a sodium salt or a potassium salt ; an alkaline earth metal salt such as a magnesium salt or a calcium salt ; an amine salt such as a dimethylamine salt or a triethylamine salt ; an inorganic acid salt such as a hydrochloride , a perchlorate , a sulfate or a nitrate ; or an organic acid salt such as an acetate or a methanesulfonate . in a case where the herbicidal benzoylpyrazole compound has various structural isomers such as optical isomers or keto - enol tautomers , such isomers are , of course , included in the present invention . as at least one compound selected from the group consisting of a polyoxyalkylene sorbitan fatty acid ester , a polyoxyalkylene fatty acid ester , a polyoxyalkylene styryl aryl ether , a polyoxyalkylene styryl aryl ether condensate and a polyoxyalkylene alkyl ether sulfate , which is the activity - improving component , a commercially available surfactant containing the above compound may be used . in the above respective compounds as the activity - improving component , the number of addition of the oxyalkylene moiety is preferably from about 1 to about 100 , more preferably from about 1 to about 50 , further preferably from about 1 to about 30 , further preferably from about 4 to about 30 . further , the oxyalkylene moiety may be either linear or branched , and it preferably has , for example , from about 2 to about 3 carbon atoms . specific examples thereof include ethylene oxide , propylene oxide and — ch ( ch 3 ) ch 2 o —. hereinafter the polyoxyalkylene moiety may sometimes be referred to as poa and the polyoxyethylene moiety as poe . in the respective compounds as the activity - improving component , the oxyalkylene moiety may be a copolymer or a block copolymer , and the position of substitution of the oxyalkylene moiety is not particularly limited . now , the poa sorbitan fatty acid ester will be described below . the poa sorbitan fatty acid ester may be any of a mono - fatty acid ester , a di - fatty acid ester and a tri - fatty acid ester . the fatty acid moiety of the poa sorbitan fatty acid ester may be either a saturated fatty acid or an unsaturated fatty acid . the fatty acid moiety has preferably from about 4 to about 24 , more preferably from about 8 to about 20 carbon atoms . the fatty acid moiety may be linear , branched or cyclic , and may have a substituent . the number of the unsaturated bond ( s ) in the unsaturated fatty acid may be one or more , and the position is also optional . specific examples of the fatty acid moiety include butyric acid , valeric acid , caproic acid , enanthic acid , caprylic acid , pelargonic acid , capric acid , lauric acid , myristic acid , pentadecylic acid , palmitic acid , palmitoleic acid , margaric acid , stearic acid , oleic acid , vaccenic acid , linoleic acid , ( 9 , 12 , 15 )- linolenic acid , tuberculostearic acid , arachidic acid , arachidonic acid , behenic acid , erucic acid , lignoceric acid and nervonic acid . specific examples of the poa sorbitan fatty acid ester include the following compounds . further , tradenames for commercially available surfactants containing the compounds are exemplified . however , the activity - improving component of the present invention is not limited thereto . rheodol tw - l120 , tw - l106 , tw - p120 , tw - s120v , tw - s106v , tw - s320v , tw - o120v , tw - o106v and tw - o320v ( each manufactured by kao corporation ) sorbon t - 20 , t - 40 , t - 60 , t - 80 and t - 85 ( each manufactured by toho chemical industry co ., ltd .) agnique sml - 20 , sms - 20 , sts - 16 , sts - 20 , smo - 5 , smo - 20 , smo - 30 , sto - 20 , sto - 2095 and sto - 2299 ( each manufactured by basf ) nonion lt - 221 , lt - 20 , pt - 221 , ot - 206 , ot - 221 , ot - 80 , st - 206 , st - 221 , st - 60 , lt - 210 and ist - 221 ( each manufactured by nof corporation ) nikkol tl - 10 , tp - 10ex , ts - 10v , ts - 106v , ts - 30v , ti - 10 , to - 10 , to - 106v and to - 30v ( each manufactured by nikko chemicals co ., ltd .) the poa fatty acid ester may be either a mono - fatty acid ester or a di - fatty acid ester . the fatty acid moiety of the poa fatty acid ester is the same as that of the above - described poa sorbitan fatty acid ester . specific examples of the poa fatty acid ester include the following compounds . further , tradenames for commercially available surfactants containing the compounds are exemplified . however , the activity - improving component of the present invention is not limited thereto . pegnol 24 - o , 14 - o and eds ( s ) ( each manufactured by toho chemical industry co ., ltd .) agnique peg 200ml , 600ml , 200mo , 260mo , 300mo , 400mo , 600mo , 400ms , 660ms , 300do , 400do , 600do and 200dl ( each manufactured by basf ) cithrol 4ms , 10ms , 4ml , 6ml , 2do , 2de , 4dl and 4ds ( each manufactured by croda ) nikkol myl - 10 , mys - 10 , mys - 45 and myo - 10 ( each manufactured by nikko chemicals co ., ltd .) nonion l - 2 , l - 4 , o - 2 , o - 4 , o - 6 , s - 1 , s - 2 , s - 4 , s - 6 , s - 10 , s - 15 , mm - 4 , mm - 9 , is - 2 , is - 4 , is - 6 , dl - 4hn , dp - 1 . 5hn , do - 4hn , ds - 4hn , dis - 400 and dis - 600 ( each manufactured by nof corporation ) lionon mo - 60 , dt - 600m , dt - 600s and dbh - 40 ( each manufactured by lion corporation ) the poa styryl aryl ether may be any of a poa monostyryl aryl ether , a poa distyryl aryl ether and a poa tristyryl aryl ether . the aryl moiety of the poa styryl aryl ether may , for example , be phenyl . specific examples of the poa styryl aryl ether include the following compounds . further , tradenames for commercially available surfactants containing the compounds are exemplified . however , the activity - improving component of the present invention is not limited thereto . sorpol t - 10 , t - 15 , t - 20 , t - 26 , t - 30 , t - 32 and t - 18d ( each manufactured by toho chemical industry co ., ltd .) agnique tsp - 14 , tsp - 15 , tsp - 16 , tsp - 17 and tsp - 34 ( each manufactured by basf ) soprophor bsu , ts / 10 , ts / 16 , ts / 29 , ts / 54 , cy / 8 and s / 40 ( each manufactured by rhodia ) emulsogen ts100 , ts160 , ts200 , ts290 , ts400 , ts540 and ts600 ( each manufactured by clariant ) the poa styryl aryl ether condensate will be described below . the poa styryl aryl ether condensate is a condensate of a poa styryl aryl ether with formaldehyde . the poa styryl aryl ether condensate may be any of a poa monostyryl aryl ether condensate , a poa distyryl aryl ether condensate and a poa tristyryl aryl ether condensate , and optional ones among the poa monostyryl aryl ether , the poa distyryl aryl ether and the poa tristyryl aryl ether may be condensed . the aryl moiety of the poa styryl aryl ether may , for example , be phenyl . specific examples of the poa styryl aryl ether condensate include the following compounds . further , tradenames for commercially available surfactants containing the compounds are exemplified . however , the activity - improving component of the present invention is not limited thereto . sorpol f - 15 , f - 19 , f - 24 and f - 27 ( each manufactured by toho chemical industry co ., ltd .) the alkyl moiety of the poa alkyl ether sulfate preferably has from about 12 to about 14 carbon atoms . the alkyl moiety may be linear , branched or cyclic , and may have a substituent . specific examples of the alkyl moiety include dodecyl , tridecyl and tetradecyl . as the salt of the poa alkyl ether sulfate , various salts may be mentioned , such as a sodium salt , a potassium salt , a calcium salt , an ammonium salt and a triethanolamine salt . specific examples of the poa alkyl ether sulfate include the following compounds . further , tradenames for commercially available surfactants containing the compounds are exemplified . however , the activity - improving component of the present invention is not limited thereto . hitenol lal2 and la14 ( each manufactured by dai - ichi kogyo seiyaku co ., ltd .) nikkol nes - 203 - 27 , nes - 303 - 36 , sbl - 2a - 27 , sbl - 2n - 27 , sbl - 2t - 36 and sbl - 3n - 27 ( each manufactured by nikko chemicals co ., ltd .) emal 20c , e - 27c , 270j , 20cm , d - 3 - d , d - 4 - d , 20t , 125hp , 170j and 327 ( each manufactured by kao corporation ) persoft el , ek , ef , efk and ef - t ( each manufactured by nof corporation ) alscoap th - 330 , th - 330k , ns - 230 , th - 370n , da - 330s , n - 355t and a - 225b ( each manufactured by toho chemical industry co ., ltd .) in the present invention , the mixing ratio of the herbicidal benzoylpyrazole compound to the activity - improving component cannot generally be defined , as it varies depending upon various conditions such as the types of the herbicidal benzoylpyrazole compound and the activity - improving component , the type of the formulation , the weather conditions , and the type and the growth stage of plants to be controlled , and is preferably from 1 : 0 . 015 to 1 : 600 , more preferably from 1 : 0 . 03 to 1 : 600 , further preferably from 1 : 0 . 75 to 1 : 150 , particularly preferably from 1 : 0 . 75 to 1 : 100 by the weight ratio . the herbicidal composition of the present invention are capable of controlling a wide range of undesired weeds , such as gramineae such as barnyardgrass ( echinochloa crus - galli l ., echinochloa oryzicola vasing . ), crabgrass ( digitaria sanguinalis l ., digitaria ischaemum muhl ., digitaria adscendens henr ., digitaria microbachne henr ., digitaria horizontalis willd . ), green foxtail ( setaria viridis l . ), giant foxtail ( setaria faberi herrm . ), yellow foxtail ( setaria lutescens hubb . ), goosegrass ( eleusine indica l . ), wild oat ( avena fatua l . ), johnsongrass ( sorghum halepense l . ), quackgrass ( agropyron repens l . ), alexandergrass ( brachiaria plantaginea ), guineagrass ( panicum maximum jacq . ), paragrass ( panicum purpurascens ), sprangletop ( leptochloa chinensis ), red sprangletop ( leptochloa panicea ), annual bluegrass ( poa annua l . ), black grass ( alopecurus myosuroides huds . ), cholorado bluestem ( agropyron tsukushiense ( honda ) ohwi ), broadleaf signalgrass ( brachiaria platyphylla nash ), southern sandbur ( cenchrus echinatus l . ), italian ryegrass ( lolium multiflorum lam . ), and bermudagrass ( cynodon dactylon pers . ); cyperaceae such as rice flatsedge ( cyperus iria l . ), purple nutsedge ( cyperus rotundus l . ), yellow nutsedge ( cyperus esculentus l . ), japanese bulrush ( scirpus juncoides ), flatsedge ( cyperus serotinus ), small - flower umbrellaplant ( cyperus difformis ), slender spikerush ( eleocharis acicularis ), and water chestnut ( eleocharis kuroquwai ); alismataceae such as japanese ribbon waparo ( saqittaria pyqmaea ), arrow - head ( sagittaria trifolia ), and narrowleaf waterplantain ( alisma canaliculatum ); pontederiaceae such as monochoria ( monochoria vaginalis ), and monochoria species ( monochoria korsakowii ); scrophulariaceae such as false pimpernel ( lindernia pyxidaria ), and abunome ( dopatrium junceum ); lythraceae such as toothcup ( rotala india ), and red stem ( ammannia multiflora ); elatinaceae such as long stem waterwort ( elatine triandra schk . ); malvaceae such as velvetleaf ( abutilon theophrasti medic . ), and prickly sida ( sida spinosa l . ); compositae such as common cocklebur ( xanthium strumarium l . ), common ragweed ( ambrosia elatior l . ), thistle ( breea setosa ( bieb .) kitam . ), hairy galinsoga ( galinsoga ciliata blake ), wild chamomile ( matricaria chamomilla l . ); solanaceae such as black nightshade ( solanum nigrum l . ), and jimsonweed ( datura stramonium ); amaranthaceae such as slender amaranth ( amaranthus viridis l . ), and redroot pigweed ( amaranthus retroflexus l . ); polygonaceeae such as pale smartweed ( polygonum lapathifolium l . ), ladysthumb ( polygonum persicaria l . ), wild buckwheat ( polygonum convolvulus l . ), and knotweed ( polygonum aviculare l . ); cruciferae such as flexuous bittercress ( cardamine flexuosa with . ), shepherd &# 39 ; s - purse ( capsella bursa - pastoris medik . ), and indian mustard ( brassica juncea czern . ); convolvulaceae such as tall morningglory ( ipomoea purpurea l . ), field bindweed ( convolvulus arvensis l . ), and ivyleaf morningglory ( ipomoea hederacea jacq . ); chenopodiaceae such as common lambsquarters ( chenopodium album l . ), and mexican burningbush ( kochia scoparia schrad . ); portulacaceae such as common purslane ( portulaca oleracea l . ); leguminosae such as sicklepod ( cassia obtusifolia l . ); caryophyllaceae such as common chickweed ( stellaria media l . ); labiatae such as henbit ( lamium amplexicaule l . ); rubiaceae such as catchweed ( galium spurium l . ); euphorbiaceae such as threeseeded copperleaf ( acalypha australis l . ); and commelinaceae such as common dayflower ( commelina communis l .). therefore , they can be effectively used for selectively controlling noxious weeds in cultivation of useful crops such as corn ( zea mays l . ), soybean ( glycine max merr . ), cotton ( gossypium spp . ), wheat ( triticum spp . ), rice ( oryza sativa l . ), barley ( hordeum vulgare l . ), rye ( secale cereale l . ), oat ( avena sativa l . ), sorgo ( sorghum bicolor moench ), rape ( brassica napus l . ), sunflower ( helianthus annuus l . ), sugar beet ( beta vulgaris l . ), sugar cane ( saccharum officinarum l . ), japanese lawnqrass ( zoysia japonica stend ), peanut ( arachis hypogaea l . ), flax ( linum usitatissimum l . ), tobacco ( nicotiana tabacum l . ), and coffee ( coffea spp .). particularly , the herbicidal composition of the present invention is effectively used for selectively controlling noxious weeds in cultivation of corn , wheat , sugar cane , and the like . its application range extends to crop plant fields , orchards and plantations . and the herbicidal composition of the present invention can be effectively used for nonselectively controlling noxious weeds . the herbicidal composition of the present invention can effectively be used to selectively control noxious weeds in cultivation of various transgenic plants . examples of the transgenic plants include insect resistant transgenic plants , plant disease - resistant transgenic plants , transgenic plants regarding the plant constituents , and herbicide - resistant transgenic plants . the herbicidal benzoylpyrazole compound may be applied in an amount of preferably from 5 to 1 , 000 g / ha , more preferably from 10 to 100 g / ha . it is particularly very useful as a herbicidal composition for corn fields , since it can control noxious weeds or inhibit their growth without impairing corn . in the present invention , a herbicidal compound other than the herbicidal benzoylpyrazole compound may be mixed if desired , whereby more excellent effects or activity may be exhibited in some cases . for example , it may sometimes be possible to improve e . g . the range of the weeds to be controlled , the timing for the application of the herbicide or the herbicidal activities . the herbicidal benzoylpyrazole compound and another herbicidal compound may be individually prepared and mixed at the time of application , or they may be formulated together and applied . such another herbicidal compound may suitably be selected from the following compound groups ( 1 ) to ( 11 ) ( common names or test codes ). even when not specifically mentioned here , in a case where such compounds have salts , alkyl esters , structural isomers such as optical isomers etc ., they are , of course , all included . ( 1 ) those which are believed to exhibit herbicidal effects by disturbing hormone activities of plants , such as a phenoxy type such as 2 , 4 - d , 2 , 4 - d - butotyl , 2 , 4 - d - butyl , 2 , 4 - d - dimethylammonium , 2 , 4 - d - diolamine , 2 , 4 - d - ethyl , 2 , 4 - d - 2 - ethylhexyl , 2 , 4 - d - isobutyl , 2 , 4 - d - isoctyl , 2 , 4 - d - isopropyl , 2 , 4 - d - isopropylammonium , 2 , 4 - d - sodium , 2 , 4 - d - isopropanolammonium , 2 , 4 - d - trolamine , 2 , 4 - db , 2 , 4 - db - butyl , 2 , 4 - db - dimethylammonium , 2 , 4 - db - isoctyl , 2 , 4 - db - potassium , 2 , 4 - db - sodium , dichlorprop , dichlorprop - butotyl , dichlorprop - dimethylammonium , dichlorprop - isoctyl , dichlorprop - potassium , dichlorprop - p , dichlorprop - p - dimethylammonium , dichlorprop - p - potassium , dichlorprop - p - sodium , mcpa , mcpa - butotyl , mcpa - dimethylammonium , mcpa - 2 - ethylhexyl , mcpa - potassium , mcpa - sodium , mcpa - thioethyl , mcpb , mcpb - ethyl , mcpb - sodium , mecoprop , mecoprop - butotyl , mecoprop - sodium , mecoprop - p , mecoprop - p - butotyl , mecoprop - p - dimethylammonium , mecoprop - p - 2 - ethylhexyl , mecoprop - p - potassium , naproanilide or clomeprop ; an aromatic carboxylic acid type such as 2 , 3 , 6 - tba , dicamba , dicamba - butotyl , dicamba - diglycolamine , dicamba - dimethylammonium , dicamba - diolamine , dicamba - isopropylammonium , dicamba - potassium , dicamba - sodium , dichlobenil , picloram , picloram - dimethylammonium , picloram - isoctyl , picloram - potassium , picloram - triisopropanolammonium , picloram - triisopropylammonium , picloram - trolamine , triclopyr , triclopyr - butotyl , triclopyr - triethylammonium , clopyralid , clopyralid - olamine , clopyralid - potassium , clopyralid - triisopropanolammonium or aminopyralid ; and others such as naptalam , naptalam - sodium , benazolin , benazolin - ethyl , quinclorac , quinmerac , diflufenzopyr , diflufenzopyr - sodium , fluroxypyr , fluroxypyr - 2 - butoxy - 1 - methylethyl , fluroxypyr - meptyl , chlorflurenol , chlorflurenol - methyl , aminocyclopyrachlor , aminocyclopyrachlor - methyl or aminocyclopyrachlor - potassium . ( 2 ) those which are believed to exhibit herbicidal effects by inhibiting photosynthesis of plants , such as a urea type such as chlorotoluron , diuron , fluometuron , linuron , isoproturon , metobenzuron , tebuthiuron , dimefuron , isouron , karbutilate , methabenzthiazuron , metoxuron , monolinuron , neburon , siduron , terbumeton , trietazine or metobromuron ; a triazine type such as simazine , atrazine , atratone , simetryn , prometryn , dimethametryn , hexazinone , metribuzin , terbuthylazine , cyanazine , ametryn , cybutryne , triaziflam , indaziflam , terbutryn , propazine , metamitron or prometon ; a uracil type such as bromacil , bromacyl - lithium , lenacil or terbacil ; an anilide type such as propanil or cypromid ; a carbamate type such as swep , desmedipham or phenmedipham ; a hydroxybenzonitrile type such as bromoxynil , bromoxynil - octanoate , bromoxynil - heptanoate , ioxynil , ioxynil - octanoate , ioxynil - potassium or ioxynil - sodium ; and others such as pyridate , bentazone , bentazone - sodium , amicarbazone , methazole or pentanochlor . ( 3 ) quaternary ammonium salt type such as paraquat or diquat , which is believed to be converted to free radicals by itself to form active oxygen in the plant body and shows rapid herbicidal efficacy . ( 4 ) those which are believed to exhibit herbicidal effects by inhibiting chlorophyll biosynthesis of plants and abnormally accumulating a photosensitizing peroxide substance in the plant body , such as a diphenylether type such as nitrofen , chiomethoxyfen , bifenox , acifluorfen , acifluorfen - sodium , fomesafen , fomesafen - sodium , oxyfluorfen , lactofen , aclonifen , ethoxyfen - ethyl , fluoroglycofen - ethyl or fluoroglycofen ; a cyclic imide type such as chlorphthalim , flumioxazin , flumiclorac , flumiclorac - pentyl , cinidon - ethyl , fluthiacet or fluthiacet - methyl ; and others such as oxadiargyl , oxadiazon , sulfentrazone , carfentrazone - ethyl , thidiazimin , pentoxazone , azafenidin , isopropazole , pyraflufen - ethyl , benzfendizone , butafenacil , saflufenacil , flupoxam , fluazolate , profluazol , pyraclonil , flufenpyr - ethyl , bencarbazone , halauxifen , tiafenacil or ethyl [ 3 -( 2 - chloro - 4 - fluoro - 5 -( 3 - methyl - 2 , 6 - dioxo - 4 - trifluoromethyl - 3 , 6 - dihydro - 2h - pyrimidin - 1 - yl ) phenoxy ) pyridin - 2 - yloxy ] acetate . ( 5 ) those which are believed to exhibit herbicidal effects characterized by bleaching activities by inhibiting chromogenesis of plants such as carotenoids , such as a pyridazinone type such as norflurazon , chloridazon or metflurazon ; a pyrazole type such as pyrazolynate , pyrazoxyfen , benzofenap , topramezone or pyrasulfotole ; and others such as amitrole , fluridone , flurtamone , diflufenican , methoxyphenone , clomazone , sulcotrione , mesotrione , tembotrione , tefuryltrione , bicyclopyrone , isoxaflutole , difenzoquat , difenzoquat - metilsulfate , isoxachlortole , benzobicyclon , picolinafen , beflubutamid , cyclopyrimorate , kuh - 110 or a compound disclosed in the claim of wo2005118530 . ( 6 ) those which exhibit strong herbicidal effects specifically to gramineous plants , such as an aryloxyphenoxypropionic acid type such as diclofop - methyl , diclofop , pyriphenop - sodium , fluazifop - butyl , fluazifop , fluazifop - p , fluazifop - p - butyl , haloxyfop - methyl , haloxyfop , haloxyfop - etotyl , haloxyfop - p , haloxyfop - p - methyl , quizalofop - ethyl , quizalofop - p , quizalofop - p - ethyl , quizalofop - p - tefuryl , cyhalofop - butyl , fenoxaprop - ethyl , fenoxaprop - p , fenoxaprop - p - ethyl , metamifop - propyl , metamifop , clodinafop - propargyl , clodinafop or propaquizafop ; a cyclohexanedione type such as alloxydim - sodium , alloxydim , clethodim , sethoxydim , tralkoxydim , butroxydim , tepraloxydim , profoxydim or cycloxydim ; and others such as flamprop - m - methyl , flamprop - m or flamprop - m - isopropyl . ( 7 ) those which are believed to exhibit herbicidal effects by inhibiting an amino acid biosynthesis of plants , such as a sulfonylurea type such as chlorimuron - ethyl , chlorimuron , sulfometuron - methyl , sulfometuron , primisulfuron - methyl , primisulfuron , bensulfuron - methyl , bensulfuron , chlorsulfuron , metsulfuron - methyl , metsulfuron , cinosulfuron , pyrazosulfuron - ethyl , pyrazosulfuron , azimsulfuron , rimsulfuron , nicosulfuron , flazasulfuron , imazosulfuron , cyclosulfamuron , prosulfuron , flupyrsulfuron - methyl - sodium , flupyrsulfuron , triflusulfuron - methyl , triflusulfuron , halosulfuron - methyl , halosulfuron , thifensulfuron - methyl , thifensulfuron , ethoxysulfuron , oxasulfuron , ethametsulfuron , ethametsulfuron - methyl , iodosulfuron , iodosulfuron - methyl - sodium , sulfosulfuron , triasulfuron , tribenuron - methyl , tribenuron , tritosulfuron , foramsulfuron , trifloxysulfuron , trifloxysulfuron - sodium , mesosulfuron - methyl , mesosulfuron , orthosulfamuron , flucetosulfuron , amidosulfuron , propyrisulfuron , metazosulfuron , iofensulfuron or a compound disclosed in the claim of ep0645386 ; a triazolopyrimidinesulfonamide type such as flumetsulam , metosulam , diclosulam , cloransulam - methyl , florasulam , penoxsulam or pyroxsulam ; an imidazolinone type such as imazapyr , imazapyr - isopropylammonium , imazethapyr , imazethapyr - ammonium , imazaquin , imazaquin - ammonium , imazamox , imazamox - ammonium , imazamethabenz , imazamethabenz - methyl or imazapic ; a pyrimidinylsalicylic acid type such as pyrithiobac - sodium , bispyribac - sodium , pyriminobac - methyl , pyribenzoxim , pyriftalid or pyrimisulfan ; a sulfonylaminocarbonyltriazolinone type such as flucarbazone , flucarbazone - sodium , propoxycarbazone - sodium , propoxycarbazone or thiencarbazone ; and others such as glyphosate , glyphosate - sodium , glyphosate - potassium , glyphosate - ammonium , glyphosate - diammonium , glyphosate - isopropylammonium , glyphosate - trimesium , glyphosate - sesquisodium , glufosinate , glufosinate - ammonium , glufosinate - p , glufosinate - p - ammonium , glufosinate - p - sodium , bilanafos , bilanafos - sodium , cinmethylin or triafamone . ( 8 ) those which are believed to exhibit herbicidal effects by inhibiting cell mitoses of plants , such as a dinitroaniline type such as trifluralin , oryzalin , nitralin , pendimethalin , ethalfluralin , benfluralin , prodiamine , butralin or dinitramine ; an amide type such as bensulide , napropamide , propyzamide or pronamide ; an organic phosphorus type such as amiprofos - methyl , butamifos , anilofos or piperophos ; a phenyl carbamate type such as propham , chlorpropham , barban or carbetamide ; a cumylamine type such as daimuron , cumyluron , bromobutide or methyldymron ; and others such as asulam , asulam - sodium , dithiopyr , thiazopyr , chlorthal - dimethyl , chlorthal or diphenamid . ( 9 ) those which are believed to exhibit herbicidal effects by inhibiting protein biosynthesis or lipid biosynthesis of plants , such as a chloroacetamide type such as alachlor , metazachlor , butachlor , pretilachlor , metolachlor , s - metolachlor , thenylchlor , pethoxamid , acetochlor , propachlor , dimethenamid , dimethenamid - p , propisochlor or dimethachlor ; a thiocarbamate type such as molinate , dimepiperate , pyributicarb , eptc , butylate , vernolate , pebulate , cycloate , prosulfocarb , esprocarb , thiobencarb , diallate , tri - allate or orbencarb ; and others such as etobenzanid , mefenacet , flufenacet , tridiphane , cafenstrole , fentrazamide , oxaziclomefone , indanofan , benfuresate , pyroxasulfone , fenoxasulfone , dalapon , dalapon - sodium , tca - sodium or trichloroacetic acid . ( 10 ) msma , dsma , cma , endothall , endothall - dipotassium , endothall - sodium , endothall - mono ( n , n - dimethylalkylammonium ), ethofumesate , sodium chlorate , pelargonic acid , nonanoic acid , fosamine , fosamine - ammonium , pinoxaden , ipfencarbazone , aclolein , ammonium sulfamate , borax , chloroacetic acid , sodium chloroacete , cyanamide , methylarsonic acid , dimethylarsinic acid , sodium dimethylarsinate , dinoterb , dinoterb - ammonium , dinoterb - diolamine , dinoterb - acetate , dnoc , ferrous sulfate , flupropanate , flupropanate - sodium , isoxaben , mefluidide , mefluidide - diolamine , metam , metam - ammonium , metam - potassium , metam - sodium , methyl isothiocyanate , pentachlorophenol , sodium pentachlorophenoxide , pentachlorophenol laurate , quinoclamine , sulfuric acid , urea sulfate , methiozolin , etc . ( 11 ) those which are believed to exhibit herbicidal effects by being parasitic on plants , such as xanthomonas campestris , epicoccosirus nematosorus , epicoccosirus nematosperus , exserohilurn monoseras or drechsrela monoceras . in the present invention , in a case where the herbicidal benzoylpyrazole compound is formulated with various additives , or in a case where the herbicidal benzoylpyrazole compound and the activity - improving component are formulated together with various additives , it may be formulated into various formulations such as wettable powders , water dispersible granules , water - based suspensions , oil - based suspensions , gel formulation , emulsifiable concentrates , soluble concentrates , liquid formulation , emulsions , microemulsions , suspoemulsions and composite emulsions . the additives which can be used may be any additives so long as they are used in this technical field , and they may , for example , be a surfactant , a carrier , a solvent , a vegetable oil , a mineral oil , an anti - settling agent , a thickener , an anti - foaming agent , an anti - freezing agent , an antioxidant agent , an oil absorb agent , a gelling agent , a filler , a dispersion stabilizer , a safener , an anti - mold agent , a binder , a stabilizer , a disintegrator , a preservative agent and an inorganic ammonium salt . specific examples of the additives include the following compounds . the herbicidal benzolypyrazole compound can be formulated in accordance with a conventional method in this technical field . the surfactant may , for example , be an anionic surfactant such as a salt of fatty acid , a benzoate , an alkylsulfosuccinate , a dialkylsulfosuccinate , a polycarboxylate , a salt of alkyl sulfuric acid ester , an alkyl sulfate , an alkyl aryl sulfate , an alkyl diglycol ether sulfate , a salt of alcohol sulfuric acid ester , an alkyl sulfonate , an alkyl aryl sulfonate , an aryl sulfonate , a lignin sulfonate , an alkyl diphenyl ether disulfonate , a polystyrene sulfonate , a salt of alkyl phosphoric acid ester , an alkyl aryl phosphate , a styryl aryl phosphate , a salt of poe alkyl ether sulfuric acid ester , a poe alkyl aryl ether sulfate , a poe styryl aryl ether sulfate , a poe styryl aryl ether sulfonate , an ammonium salt of poe styryl aryl ether sulfate , a salt of poe alkyl aryl ether sulfuric acid ester , a poe alkyl ether phosphate , a salt of poe alkyl aryl phosphoric acid ester , a poe styryl aryl ether phosphoric acid ester or its salt , a salt of naphthalene suifonic acid condensed with formaldehyde , or a salt of alkylnaphthalene sulfonic acid condensed with formaldehyde ; a nonionic surfactant such as a sorbitan fatty acid ester , a glycerin fatty acid ester , a fatty acid polyglyceride , a fatty acid alcohol polyglycol ether , acetylene glycol , acetylene alcohol , an oxyalkylene block polymer , a poe alkyl ether , a poe aryl ether , a poe alkyl aryl ether , a poe styryl aryl ether , a poe glycol alkyl ether , a poe alkyl ester , a poe sorbitan alkyl ester , a poe sorbitol alkyl ester , a poe fatty acid ester , a poe sorbitan fatty acid ester , a poe sorbitol fatty acid ester , a poe glycerin fatty acid ester , poe hydrogenated castor oil , poe castor oil or a polyoxypropylene fatty acid ester ; or a cationic surfactant such as an alkoxylated fatty amine , and they may be used as a mixture of two or more if desired . the carrier or the filler may , for example , be diatomaceous earth , slaked lime , calcium carbonate , talc , white carbon , kaolin , bentonite , a mixture of kaolinite and sericite , clay , sodium carbonate , sodium bicarbonate , mirabilite , zeolite , starch , sodium chloride , ammonium phosphate , ammonium sulfate , ammonium chloride , sugar , urea , lactose or glucose , and they may be used as a mixture of two or more if desired . the solvent may , for example , be water , solvent naphtha , paraffin , dioxane , acetone , isophorone , methyl isobutyl ketone , cyclohexane , dimethyl sulfoxide , dimethyl formamide , n - methyl - 2 - pyrolidone , an alcohol , acetic acid , butyric acid , isopropyl acetate , butyl acetate , alkylbenzene , alkylnaphthalene or a glycol . they may be used as a mixture of two or more if desired . the vegetable oil may , for example , be olive oil , kapok oil , castor oil , papaya oil , camelia oil , coconut oil , sesame oil , corn oil , rice bran oil , peanut oil , cottonseed oil , soybean oil , rapeseed oil , linseed oil , tung oil , sunflower oil , safflower oil , a fatty acid derived from the above - described respective oils , or an alkyl ester of the fatty acid , and the mineral oil may , for example , be an aliphatic hydrocarbon such as liquid paraffin or paraffin petroleum , or an aromatic hydrocarbon such as an alkylbenzene or an alkylnaphthalene , and they may be used as a mixture of two or more if desired . the above - described fatty acid may , for example , be a c 12 - 22 saturated or unsaturated fatty acid such as lauric acid , palmitic acid , stearic acid , oleic acid , linoleic acid , linolenic acid , erucic acid or brassidic acid , and the alkyl ester thereof may be a c 1 - 18 linear or branched alkyl ester such as a methyl ester , a butyl ester , an isobutyl ester or an oleyl ester . the anti - settling agent may , for example , be silica , organic bentonite ( bentonite - alkylamino complex ), bentonite , white carbon or aluminum magnesium silicate , and they may be used as a mixture of two or more if desired . the thickener may , for example , be a heteropolysaccharide such as xanthan gum or guar gum , a water - soluble polymer such as polyvinyl alcohol , carboxymethylcellulose sodium salt or sodium alginate , or bentonite or white carbon , and they may be used as a mixture of two or more if desired . the anti - foaming agent may , for example , be polydimethylsiloxane or acetylene alcohol , and they may be used as a mixture of two or more if desired . the anti - freezing agent may , for example , be ethylene glycol , propylene glycol , glycerin or urea , and they may be used as a mixture of two or more if desired . the oil absorb agent may , for example , be silicon dioxide , starch hydrolysate , kaolin , clay , talc , diatomaceous earth , artificial diatomaceous earth / lime , asbestos , a mixture of kaolinite and sericite , calcium silicate , precipitated calcium carbonate light , silicificated precipitated calcium carbonate light , acid clay , carbon black , natural earthy graphite , pearlite product , ultrafine aluminum oxide anhydrous particles , ultrafine titanium oxide particles , basic magnesium carbonate , magnesium aluminosilicate , a silica / alumina synthetic filler or magnesium silicate hydrate , and they may be used as a mixture of two or more if desired . the gelling agent may , for example , be silica , organic attapulgite , clay , hydrogenated castor oil , a higher fatty acid ester , a higher alcohol , a salt of dialkylsulfosuccinic acid ester , a salt of benzoic acid , an alkyl sulfate , a mixture of a polyacrylic polymer or a polyacrylic copolymer and water , or 12 - hydroxystearic acid , and they may be used as a mixture of two or more if desired . the binder may , for example , be lignin sulfonate , xanthan gum , carboxymethylcellulose or starch , and they may be used as a mixture of two or more if desired . the disintegrator may , for example , be an inorganic salt such as carboxymethyl cellulose calcium salt , ammonium sulfate , potassium chloride or magnesium chloride , or one having disintegrating effect among the above - mentioned surfactants , such as sodium lauryl sulfate , sodium dodecylbenzene sulfonate or ammonium polyacrylate , and they may be used as a mixture of two or more if desired . the preservative agent may , for example , be formaldehyde , parachlorometaxylenol or 1 , 2 - benzoisothiazolin - 3 - one , and they may be used as a mixture of two or more if desired . in the above various formulations , the blend ratio of the respective components cannot be generally be defined , as it varies depending upon various conditions such as the type of the components , the type of the formulation , and the application site . for example , the herbicidal benzoylpyrazole compound is blended in a ratio of preferably from 0 . 1 to 95 parts by weight , more preferably from 2 to 85 parts by weight , and as the rest , the additives are blended in a ratio of preferably from 5 to 99 . 9 parts by weight , more preferably from 15 to 98 parts by weight . further , in a case where the activity - improving component is blended in a ratio of preferably from 0 . 1 to 94 . 9 parts by weight , more preferably from 5 to 60 parts by weight if desired , and another herbicidal compound is blended in a ratio of preferably from 0 . 1 to 94 . 9 parts by weight , more preferably from 0 . 5 to 75 parts by weight if desired , the additives are blended as the rest , so that the total amount is 100 parts by weight . the blend ratios of the respective components in several formulations are mentioned below , however , the present invention is not limited to such specific formulations . in the case of a water - based suspension , the herbicidal benzoylpyrazole compound is blended in a ratio of preferably from 0 . 1 to 60 parts by weight , more preferably from 2 to 50 parts by weight , the surfactant is blended in a ratio of preferably from 0 . 5 to 20 parts by weight , more preferably from 1 to 15 parts by weight , and as the rest , water is blended in a ratio of preferably from 25 to 99 . 4 parts by weight , more preferably from 30 to 97 parts by weight to prepare a water - based suspension . further , in a case where the activity - improving component is blended in a ratio of preferably from 0 . 1 to 60 parts by weight , more preferably from 5 to 40 parts by weight if desired , another herbicidal compound is blended in a ratio of preferably from 0 . 1 to 60 parts by weight , more preferably from 0 . 5 to 30 parts by weight if desired , an anti - foaming agent is blended in a ratio of preferably from 0 . 05 to 3 parts by weight , more preferably from 0 . 1 to 1 part by weight if desired , an anti - freezing agent is blended in a ratio of preferably from 0 . 5 to 10 parts by weight , more preferably from 2 to 10 parts by weight if desired , an anti - settling agent is blended in a ratio of preferably from 0 . 1 to 5 parts by weight , more preferably from 0 . 5 to 3 parts by weight if desired , a thickener is blended in a ratio of preferably from 0 . 1 to 5 parts by weight , more preferably from 0 . 1 to 2 parts by weight if desired , and a preservative agent is blended in a ratio of preferably from 0 . 01 to 1 part by weight , more preferably from 0 . 05 to 0 . 2 part by weight if desired , water is blended as the rest so that the total amount is 100 parts by weight to prepare a water - based suspension . in the case of an oil - based suspension , the herbicidal benzoylpyrazole compound is blended in a ratio of preferably from 0 . 1 to 40 parts by weight , more preferably from 2 to 35 parts by weight , the surfactant is blended in a ratio of preferably from 1 to 30 parts by weight , more preferably from 1 to 25 parts by weight , and as the rest , an oil , preferably a vegetable oil or a mineral oil is blended in a ratio of preferably from 10 to 98 . 9 parts by weight , more preferably from 20 to 97 parts by weight to prepare an oil - based suspension . further , in a case where the activity - improving component is blended in a ratio of preferably from 0 . 1 to 80 parts by weight , more preferably from 5 to 60 parts by weight if desired , another herbicidal compound is blended in a ratio of preferably from 0 . 1 to 40 parts by weight , more preferably from 0 . 5 to 30 parts by weight if desired , and an anti - settling agent is blended in a ratio of preferably from 0 . 1 to 5 parts by weight , more preferably from 0 . 5 to 3 parts by weight if desired , a vegetable oil or a mineral oil is blended as the rest so that the total amount is 100 parts by weight to prepare an oil - based suspension . in the case of a wettable powder , the herbicidal benzoylpyrazole compound is blended in a ratio of preferably from 0 . 1 to 95 parts by weight , more preferably from 5 to 85 parts by weight , the surfactant is blended in a ratio of preferably from 0 . 5 to 40 parts by weight , more preferably from 5 to 30 parts by weight , and as the rest , a carrier or a filler is blended in a ratio of preferably from 4 . 5 to 99 . 4 parts by weight , more preferably from 10 to 90 parts by weight to prepare a wettable powder . further , in a case where the activity - improving component is blended in a ratio of preferably from 0 . 1 to 94 . 9 parts by weight , more preferably from 10 to 60 parts by weight if desired , another herbicidal compound is blended in a ratio of preferably from 0 . 1 to 94 . 9 parts by weight , more preferably from 0 . 5 to 75 parts by weight if desired , and an oil absorb agent is blended in a ratio of preferably from 1 to 90 parts by weight , more preferably from 1 to 50 parts by weight if desired , a carrier or a filler is blended as the rest so that the total amount is 100 parts by weight to prepare a wettable powder . preferred embodiments of the present invention will be described below , but the present invention is by no means restricted thereto . 1 . a herbicidal composition comprising ( 1 ) 1 -( 1 - ethyl - 4 -( 3 -( 2 - methoxyethoxy )- 2 - methyl - 4 -( methylsulfonyl ) benzoyl )- 1h - pyrazol - 5 - yloxy ) ethyl methyl carbonate ( the above compound no . 6 ) or its salt and ( 2 ) at least one compound selected from the group consisting of a poa sorbitan fatty acid ester , a poa fatty acid ester , a poa styryl aryl ether , a poa styryl aryl ether condensate and a poa alkyl ether sulfate ( hereinafter referred to as an activity - improving component ). 2 . the herbicidal composition according to the above 1 , wherein the activity - improving component is at least one compound selected from the group consisting of a poa sorbitan fatty acid ester and a poa fatty acid ester . 3 . the herbicidal composition according to the above 1 , wherein the activity - improving component is a poa sorbitan fatty acid ester . 4 . the herbicidal composition according to the above 1 , wherein the activity - improving component is a poa fatty acid ester . 5 . a method for controlling undesired plants , which comprises applying ( 1 ) the above compound no . 6 or its salt and ( 2 ) the activity - improving component to the undesired plants or to a place where they grow . 6 . the method according to the above 5 , wherein the activity - improving component is at least one compound selected from the group consisting of a poa sorbitan fatty acid ester and a poa fatty acid ester . 7 . the method according to the above 5 , wherein the activity - improving component is a poa sorbitan fatty acid ester . 8 . the method according to the above 5 , wherein the activity - improving component is a poa fatty acid ester . 9 . a method for improving the herbicidal activity of the compound no . 6 or its salt by using the activity - improving component . 10 . the method according to the above 9 , wherein the activity - improving component is at least one compound selected from the group consisting of a poa sorbitan fatty acid ester and a poa fatty acid ester . 11 . the method according to the above 9 , wherein the activity - improving component is a poa sorbitan fatty acid ester . 12 . the method according to the above 9 , wherein the activity - improving component is a poa fatty acid ester . 13 . the herbicidal composition according to the above 3 , the method according to the above 7 , or the method according to the above 11 , wherein the poa sorbitan fatty acid ester is at least one compound selected from the group consisting of poe sorbitan monolaurate , poe sorbitan dilaurate , poe sorbitan trilaurate , poe sorbitan monopalmitate , poe sorbitan dipalmitate , poe sorbitan tripalmitate , poe sorbitan monomyristate , poe sorbitan dimyristate , poe sorbitan trimyristate , poe sorbitan monostearate , poe sorbitan distearate , poe sorbitan tristearate , poe sorbitan monoisostearate , poe sorbitan diisostearate , poe sorbitan triisostearate , poe sorbitan monooleate , poe sorbitan dioleate and poe sorbitan trioleate . 14 . the herbicidal composition according to the above 4 , the method according to the above 8 or the method according to the above 12 , wherein the poa fatty acid ester is at least one compound selected from the group consisting of poe monolaurate , poe dilaurate , poe monooleate , poe dioleate , poe monostearate , poe distearate , poe monoisostearate , poe diisostearate , poe monopalmitate , poe dipalmitate , poe monomyristate , poe dimyristate , poe di - 2 - ethylhexoate and poe dierucate . 15 . the herbicidal composition according to the above 4 , the method according to the above 8 or the method according to the above 12 , wherein the poa fatty acid ester is poa di - fatty acid ester . 16 . an oil - based suspension comprising ( 1 ) the above compound no . 6 or its salt , ( 2 ) the activity - improving component , ( 3 ) a surfactant and ( 4 ) a vegetable oil or a mineral oil . 17 . the oil - based suspension according to the above 16 , wherein the activity - improving component is at least one compound selected from the group consisting of a poa sorbitan fatty acid ester and a poa fatty acid ester . 18 . the oil - based suspension according to the above 16 , wherein the activity - improving component is a poa sorbitan fatty acid ester . 19 . the oil - based suspension according to the above 16 , wherein the activity - improving component is a poa fatty acid ester . 20 . the oil - based suspension according to any one of the above 16 to 19 , wherein ( 3 ) the surfactant is at least one surfactant selected from the group consisting of poe hydrogenated castor oil , poe styryl phenyl ether , a poe sorbitol fatty acid ester and a sorbitan fatty acid ester . 21 . the oil - based suspension according to any one of the above 16 to 20 , wherein ( 4 ) the vegetable oil or the mineral oil is a vegetable oil , a fatty acid derived from the vegetable oil or an alkyl ester of the fatty acid . 22 . the oil - based suspension according to any one of the above 16 to 21 , which contains ( 1 ) from 0 . 1 to 40 parts by weight of the above compound no . 6 or its salt , ( 2 ) from 0 . 1 to 80 parts by weight of the activity - improving component , ( 3 ) from 1 to 30 parts by weight of the surfactant , and ( 4 ) from 10 to 98 . 8 parts by weight of the vegetable oil or the mineral oil . 23 . an oil - based suspension , which contains ( 1 ) from 0 . 1 to 40 parts by weight of the above compound no . 6 or its salt , ( 2 ) from 0 . 1 to 80 parts by weight of the activity - improving component , ( 3 ) from 1 to 30 parts by weight of a surfactant , ( 4 ) from 0 . 1 to 5 parts by weight of an anti - settling agent and ( 5 ) from 10 to 98 . 7 parts by weight of a vegetable oil or a mineral oil . now , the present invention will be described in further detail with reference to examples . however , the present invention is by no means restricted to such specific examples . compound nos . in examples are compound nos . in the above table 1 . ( 1 ) compound no . 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 or 9 ( purity 99 . 6 %): 36 . 26 parts by weight ( 2 ) alkylnaphthalene sulfonate condensed with formaldehyde ( tradename : morwet d425 manufactured by akzonobel ): 2 . 21 parts by weight ( 3 ) poe styryl phenyl ether phosphate potassium salt ( tradename : soprophor flk / 70 manufactured by rhodia ): 2 . 21 parts by weight ( 4 ) aluminum magnesium silicate ( tradename : veegum r manufactured by sanyo chemical industries , ltd . ): 0 . 88 part by weight ( 6 ) dimethylpolysiloxane ( tradename : silcolapse 432 manufactured by bluestar silicones ): 0 . 35 part by weight ( 7 ) xanthan gum ( tradename : rhodopol 23 manufactured by rhodia ): 0 . 09 part by weight ( 8 ) 1 , 2 - benzisothiazolin - 3 - one ( tradename : proxel gxl manufactured by arch chemicals , inc . ): 0 . 04 part by weight the above components are mixed and pulverized by a wet pulverizer for 5 minutes to prepare a water - based suspension . this is diluted with water together with the activity - improving component and applied . ( 1 ) compound no . 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 or 9 ( purity : 99 . 6 %): 36 . 26 parts by weight ( 2 ) morwet d425 ( tradename ): 2 . 65 parts by weight ( 3 ) ammonium poe styryl phenyl ether sulfonate ( tradename : soprophor 4d384 manufactured by rhodia ): 2 . 21 parts by weight the above components are mixed and pulverized by a wet pulverizer for 5 minutes to prepare a water - based suspension . this is diluted with water together with the activity - improving component and applied . ( 1 ) compound no . 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 or 9 ( purity : 99 . 6 %): 36 . 26 parts by weight ( 3 ) poe / polyoxypropylene block copolymer ( tradename : pluronic pe10300 manufactured by basf ): 2 . 21 parts by weight the above components are mixed and pulverized by a wet pulverizer for 5 minutes to prepare a water - based suspension . this is diluted with water together with the activity - improving component and applied . ( 1 ) compound no . 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 or 9 ( purity : 99 . 6 %): 10 . 67 parts by weight ( 2 ) mixture containing poe hydrogenated castor oil ( tradename : sorpol 3815a manufactured by toho chemical industry co ., ltd . ): 10 . 42 parts by weight ( 3 ) organic bentonite ( bentonite - alkylamino complex ) ( tradename : new d orben manufactured by shiraishi kogyo kaisha , ltd . ): 1 . 04 parts by weight ( 4 ) poe sorbitan fatty acid ester ( tradename : sorbon t - 85 manufactured by toho chemical industry co ., ltd . ): 20 . 83 parts by weight ( 5 ) methylated seed oil ( tradename : agnique me 18rd - f manufactured by basf ): 57 . 04 parts by weight the above components are mixed and pulverized by a wet pulverizer for 5 minutes to prepare an oil - based suspension . this is diluted with water and applied . ( 1 ) compound no . 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 or 9 ( purity : 99 . 6 %): 10 . 67 parts by weight ( 4 ) isoparaffin ( tradename : ip solvent 1016 manufactured by idemitsu kosan co ., ltd . ): 57 . 04 parts by weight the above components are mixed and pulverized by a wet pulverizer for 5 minutes to prepare an oil - based suspension . this is diluted with water and applied . ( 1 ) compound no . 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 or 9 ( purity : 99 . 6 %): 31 . 25 parts by weight ( 3 ) silica ( tradename : aerosil r972 manufactured by nippon aerosil co ., ltd . ): 0 . 63 part by weight ( 4 ) poe styryl phenyl ether ( tradename : sorpol - 19 manufactured by toho chemical industry co ., ltd . ): 10 . 42 parts by weight the above components are mixed and pulverized by a wet pulverizer for 5 minutes to prepare an oil - based suspension . this is diluted with water and applied . ( 1 ) compound no . 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 or 9 ( purity : 99 . 6 %): 10 . 67 parts by weight ( 2 ) mixture containing poe sorbitol fatty acid ester ( tradename : sorpol 4300 manufactured by toho chemical industry co ., ltd . ): 10 . 42 parts by weight ( 4 ) poe fatty acid ester ( tradename : pegnol 24 - 0 manufactured by toho chemical industry co ., ltd . ): 52 . 08 parts by weight ( 5 ) methylated seed oil ( tradename : agnique me 18rd - f manufactured by basf ): 25 . 79 parts by weight the above components are mixed and pulverized by a wet pulverizer for 5 minutes to prepare an oil - based suspension . this is diluted with water and applied . ( 1 ) compound no . 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 or 9 ( purity : 99 . 6 %): 10 . 67 parts by weight the above components are mixed and pulverized by a wet pulverizer for 5 minutes to prepare an oil - based suspension . this is diluted with water and applied . ( 1 ) compound no . 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 or 9 ( purity : 99 . 6 %): 10 . 67 parts by weight ( 2 ) polycarboxylate ( tradename : geropon t / 36 manufactured by rhodia ): 3 parts by weight ( 3 ) alkylnaphthalene sulfonate ( tradename : supragil wp manufactured by rhodia ): 2 parts by weight ( 4 ) alkyl naphthalene sulfonate condensed with formaldehyde ( tradename : supragil mns / 90 manufactured by rhodia ): 5 parts by weight ( 5 ) poe alkyl ether sulfate ( tradename : hitenol lal2 manufactured by dai - ichi kogyo seiyaku co ., ltd . ): 40 parts by weight ( 6 ) white carbon ( tradename : carplex # 80 manufactured by evonik degussa japan co ., ltd . ): 39 . 33 parts by weight hitenol lal2 is adsorbed on carplex # 80 , and mixed with the other components to prepare a wettable powder . this is diluted with water and applied . the above components are mixed and pulverized by a wet pulverizer for 5 minutes to prepare an oil - based suspension . this is diluted with water and applied . ( 3 ) poe sorbitan fatty acid ester ( tradename : sorbon t - 60 manufactured by ( 4 ) sorbitan fatty acid ester ( tradename : sorbon s - 80 manufactured by toho chemical industry co ., ltd . ): 10 . 0 parts by weight the above components are mixed and pulverized by a wet pulverizer for 5 minutes to prepare an oil - based suspension . this is diluted with water and applied . ( 3 ) poe fatty acid ester ( tradename : cithrol 4ml manufactured by croda ): 30 . 0 parts by weight the above components are mixed and pulverized by a wet pulverizer for 5 minutes to prepare an oil - based suspension . this is diluted with water and applied . now , test examples will be described . the activity - improving components used in test examples are as follows . upland field soil was put into a 1 / 1 , 000 , 000 ha pot , and seeds of barnyardgrass ( echinochloa crus - galli l .) and seeds of velvetleaf ( abutilon theophrasti l .) were respectively sown and grown in a greenhouse . when the barnyardgrass reached 4 . 0 to 4 . 7 - leaf stage and the velvetleaf reached 3 . 0 to 4 . 0 - leaf stage , a prescribed amount ( 15 g a . i ./ ha ) of a composition comprising compound no . 6 as an active ingredient prepared in accordance with example 1 was diluted with water ( containing 0 . 05 vol % of the activity - improving component ) in an amount corresponding to 300 l / ha , and applied for foliar treatment . for comparison , a behenic acid monoethanolamide surfactant ( tradename : incromide manufactured by croda ) was used at a concentration of 0 . 05 vol % instead of the activity - improving component of the present invention , and the composition was applied for foliar treatment similarly . on the 25th day after treatment , the state of growth of the plants was visually observed to determine the growth inhibition rate (%)= 0 ( equivalent to the non - treated area ) to 100 ( complete kill ), and the results as shown in table 2 were obtained . in accordance with the above test example 1 , the effect on velvetleaf ( abutilon theophrasti l .) at 2 . 0 to 3 . 0 - leaf stage was confirmed . for comparison , a methylated seed oil activity - strengthening agent ( tradename : destiny ho manufactured by agriliance ) was used at a concentration of 0 . 5 vol %. on the 21st day after treatment , the growth inhibition rate (%) was determined in the same manner as in test example 1 and the results are shown in table 3 . in accordance with the above test example 1 , the effect on velvetleaf ( abutilon theophrasti l .) at 3 . 3 to 3 . 8 - leaf stage was confirmed . for comparison , methyl oleate ( a mixture of methyl oleate : commercially available emulsifying agent = 88 : 12 ) was used at a concentration of 0 . 05 vol %. the commercially available emulsifying agent used was a mixture of poe alkyl aryl ether , poe hydrogenated castor oil ether , a fatty acid derivative and sodium dialkylsulfosuccinate ( tradename : sorpol 3815k , manufactured by toho chemical industry co ., ltd .). on the 21st day after treatment , the growth inhibition rate was determined in the same manner as in test example 1 and the results are shown in table 4 . in accordance with the above test example 1 , the effect on barnyardgrass ( echinochloa crus - galli l .) at 3 . 5 to 4 . 3 - leaf stage was confirmed . for comparison , methyl oleate ( the same as in test example 3 ) was used at a concentration of 0 . 05 vol %. on the 23rd day after treatment , the growth inhibition rate was determined in the same manner as in test example 1 and the results are shown in table 5 . here , when no activity - improving component was added , the growth inhibition rate of barnyardgrass was 0 %. upland field soil was put into a 1 / 1 , 000 , 000 ha pot , and seeds of crabgrass ( digitaria ciliaris ( retz .) koel .) were sown and grown in a greenhouse . when the crabgrass reached 3 . 6 to 4 . 2 - leaf stage , a prescribed amount ( 30 g a . i ./ ha ) of a composition comprising compound no . 6 as an active ingredient prepared in accordance with example 1 was diluted with water ( containing 0 . 05 vol % of the activity - improving component ) in an amount corresponding to 300 l / ha , and applied for foliar treatment . for comparison , a polyoxyethylene octyl phenyl ether surfactant ( tradename : kusarino manufactured by nihon noyaku co ., ltd .) or methyl oleate ( the same as in test example 3 ) were used at a concentration of 0 . 05 vol % instead of the activity - improving component of the present invention , and each composition was applied similarly . on the 25th day after treatment , the growth inhibition rate was determined in the same manner as in test example 1 and the results are shown in table 6 . upland field soil was put into a 1 / 1 , 000 , 000 ha pot , and seeds of barnyardgrass ( echinochloa crus - galli l .) were sown and grown in a greenhouse . when the barnyardgrass reached 4 . 0 to 5 . 0 - leaf stage , a prescribed amount ( 100 g a . i ./ ha ) of a composition comprising compound no . 6 as an active ingredient prepared in accordance with example 1 was diluted with water ( containing 0 . 025 vol % of the activity - improving component ) in an amount corresponding to 300 l / ha , and applied for foliar treatment . for comparison , kusarino ( the same as in test example 5 ) was used at a concentration of 0 . 025 vol % instead of the activity - improving component of the present invention , and the composition was applied similarly . on the 21st day after treatment , the growth inhibition rate was determined in the same manner as in test example 1 and the results are shown in table 7 . upland field soil was put into a 1 / 1 , 000 , 000 ha pot , and seeds of velvetleaf ( abutilon theophrasti l .) were sown and grown in a greenhouse . when the velvetleaf reached 4 . 4 to 5 . 4 - leaf stage , a prescribed amount ( 10 g a . i ./ ha ) of a composition comprising compound no . 6 as an active ingredient prepared in accordance with example 1 was diluted with water ( containing 0 . 5 vol % of the activity - improving component ) in an amount corresponding to 300 l / ha , and applied for foliar treatment . for comparison , kusarino ( the same as in test example 5 ) was used at a concentration of 0 . 5 vol % instead of the activity - improving component of the present invention , and the composition was applied similarly . on the 22nd day after treatment , the growth inhibition rate was determined in the same manner as in test example 1 and the results are shown in table 8 . upland field soil was put into a 1 / 1 , 000 , 000 ha pot , and seeds of barnyardgrass ( echinochloa crus - galli l .) and velvetleaf ( abutilon theophrasti l .) were sown and grown in a greenhouse . when the barnyardgrass reached 4 . 0 to 4 . 5 - leaf stage and the velvetleaf reached 2 . 7 to 3 . 5 - leaf stage , a prescribed amount ( 30 g a . i ./ ha ) of an oil - based suspension comprising compound no . 6 as an active ingredient prepared in accordance with example 10 was diluted with water in an amount corresponding to 300 l / ha , and applied for foliar treatment . on the 26th day after treatment , the state of growth of the barnyardgrass was visually observed , and on the 24th day after treatment , the state of growth of the velvetleaf was visually observed , to determine the growth inhibition rates in the same manner as in test example 1 and the results are shown in table 9 . upland field soil was put into a 1 / 1 , 000 , 000 ha pot , and seeds of corn ( zea mays l .) were sown and grown in a greenhouse . when the corn reached 3 . 8 to 4 . 5 - leaf stage , a prescribed amount ( 30 , 60 or 90 g a . i ./ ha ) of an oil - based suspension comprising compound no . 6 as an active ingredient prepared in accordance with example 10 was diluted with water in an amount corresponding to 300 l / ha , and applied for foliar treatment . on the 6th day after treatment , the growth inhibition rate was determined in the same manner as in test example 1 and the results are shown in table 10 . upland field soil was put into a 1 / 1 , 000 , 000 ha pot , and seeds of crabgrass { p47051 02264045 . 000 } ( digitaria ciliaris ( retz .) koel .) and barnyardgrass ( echinochloa crus - galli l .) were sown and grown in a greenhouse . when the crabgrass reached 4 . 4 to 5 . 4 - leaf stage and the barnyardgrass reached 4 . 0 to 5 . 1 - leaf stage , prescribed amounts ( 30 + 30 g a . i ./ ha ) of oil - based suspensions each comprising compound no . 6 and nicosulfuron as active ingredients , prepared in accordance with examples 11 and 12 , were diluted with water in an amount corresponding to 300 l / ha and applied for foliar treatment . on the 21st day after treatment , the growth inhibition rate was determined in the same manner as in test example 1 and the results are shown in table 11 .
in order to reduce the environmental load on an area where a herbicide is applied or a surrounding area thereof more than ever , it has been required to improve activity of a herbicidal active ingredient and to reduce its dose as far as possible . a herbicidal composition comprising a benzoylpyrazole compound represented by the formula or its salt : wherein each of q , r 1 , r 2 , r 3 , r 4 , r 5 , r 6 and a is as defined in the specification , and at least one compound selected from the group consisting of a polyoxyalkylene sorbitan fatty acid ester , a polyoxyalkylene fatty acid ester , a polyoxyalkylene styryl aryl ether , a polyoxyalkylene styryl aryl ether condensate and a polyoxyalkylene alkyl ether sulfate .