Electroantennographic Responses of Fopius vandenboschi and Diachasmimorpha longicaudata to Volatile Compounds of Inhabit Plants
Both of Fopius vandenboschi(Fullaway)and Diachasmimorpha longicaudata(Ashmead)are the parasitoids of Bactrocera dorsalis(Hendel).Their electroantennogram detection(EAG)responses to 9 volatile compounds of the host plants were tested here.The detection revealed that,among the tested 9 compounds,valencene induced the significantly highest EAG response by F.vandenboschi of both sexes,while caryophyllene induced the lowest.Adult females of D.longicaudata showed the strongest EAG response to alpha-farnesene,and the lowest to dl-Limonene.The male D.longicaudata exhibited the strongest EAG response to(E)-2-decenal,and the lowest response to dihydro-beta.-ionone and caryophyllene.These results indicated that valencene may be the semiochemical for F.vandenboschi to search the host plant,and(E)-2-decenal for D.longicaudata.