Laboratory Toxicity Tests and Field Trials of 5 Kinds of Insecticides to Colposcelis signata Motschulsky
[Aims] The study aims to screen out the insecticides with highly efficacy and low toxicity for controlling Colposcelis signata adults.[Methods] Toxicity test in laboratory was done by the method of dipping foliar and field efficacy of five insecticides was done by using foliar spraying.[Results] The results of toxicity test showed that matrine 0.5％ SL was highly toxic to C.signata adults.Furhter,with LC50 values of 0.23 mg/L after 24 hours and 0.10 mg/L after 72 h,respectively.Followed by beta-cypermethrin 4.5％ EC and emamectin benzoate 1.14％ EC,their LC50 values were 1.17 and 3.39 mg/L,respectively.The results of field experiments showed that five pesticides were highly active and could be used as the candidates for controling C.Signata adults.Especially matrine 0.5％ SL and imidacloprid 10％ WP had the characteristics of efficient and sustainable control effect.[Conclusions] Therefore,matrine 0.5％ SL and imidacloprid 10％ WP were the most appropriate insecticides for controling C.signata adults.While emamectin benzoate 1.14％ EC could be applied as the alternative pesticides.
NETL
NSTL
万方数据
维普
