NGHIÊN CỨU ẢNH HƯỞNG CỦA THUỐC TRỪ SÂU NHÓM PYRETHROID ĐẾN MỘT SỐ LOÀI THIÊN ĐỊCH CHÍNH TRÊN RAU

The paper introduce recent research fidings of Institute for Agriculture Environment on the negative effect of Pyrethroid insecticides (Permethrin and Cypermethrin) to predators on vegetable aiming to develop safe use guidline of those pesticides. The initial result of green house and field experiments showed that when directly spray on insect, Permethrin at usual dosage may caused 92.22% motality of Micraspisa discolor population and 100% Ophionea indica where as Cypermethrin cuased lower motality (33.33% to Micraspisa discolor and 76.67% to Ophionea indica). When spraying on plant, Permethrin caused 75% motality of Micraspisa discolor and 73.33% of Ophionea indica; Cypermethrin caused 69.23% and 67.64% respectively at 3 days after application, significantly higher than bio-pesticide (Emamectin).