Study on the toxicity of five pesticides to Chironomus kiiensis
The acute and chronic toxicities of five pesticides to Chironomus kiiensis were studied to evaluate the toxicity risks of different types of pesticides to benthic chironomid.The results showed that the five pesticides all had significant toxic effects on C.kiiensis.Based on the 48 h EC50 in the acute toxicity test,the toxicity on C.kiiensis followed the order of lambda-cyhalothrin,acetamiprid,pyriproxyfen,pyraclostrobin,and butachlor.Based on the emergence EC50 in the chronic toxicity test,the toxicity followed the order of lambda-cyhalothrin,pyriproxyfen,acetamiprid,pyraclostrobin,and butachlor.With the increase of pesticide concentration in the treatment group,the pupation rate and eclosion rate of C.kiiensis decreased significantly,and the larval and pupal stages were also prolonged.In the chronic toxicity test,there was no significant difference between the EC50 of pupation and that of eclosion for all of the 5 pesticides.
万方数据
维普
