Application of thermal fogger to the control of maize diseases and pests.
The chemical control of maize pests and diseases was mainly at the latter stage of corn growth,but maize grew too highly to spray chemicals in the field at this stage in this paper,some oils was used as a pesticide carrier in thermal fogger,which became gasification in a flash and formed heat fog at the high temperature point(350~400℃) through the tube.The heat fog was well distributed,so chemicals were sprayed along the ridge in maize by use of thermal fogger.The droplet subsidence distribution rule and the control efficiency of chemicals on maize diseases and pests by means of thermal fogger were studied in contrast with electric mist sprayer.The results showed that the control effect of chemicals on pests by thermal fogger was higher than that of electric mist sprayer.The effective distance of spraying by thermal fogger was more than 25 m;the droplet deposition was symmetrical at the level distance from 0 to 25 m,and vertical height from 0 to 2 m.The droplets of the foliar were about 150～300 cm-2,50～140 cm-2 on the blade back.