Indoor Toxicity Bioassay of Common Pesticides(Acaricides) in Vegetable Field to Adult Euseius nicholsi

In order to guide the using of pesticides and decrease the killing of E.nicholsi,toxicity of 10 pesticides to adult E.nicholsi was determined by using slide-dip method in the laboratory.The results showed that toxicity of Azadirachtin was the highest with LC50 of 12.722 5 mg/L.Toxicity of Spirodiclofen was the lowest,LC50 was 1217.3463 mg/L.Toxicity of these 10 pesticides from low to high to adult E.nicholsi was Spirodiclofen Lambda-cyhalothrin Abamectin Imidacloprid Pyridaben Emamectin benzoate Propargite Chlorfenapyr Chloride cyanide chlorpyrifos Azadirachtin.