5种化学农药对松毛虫赤眼蜂的毒力测定

Toxicity Determination of Five Chemical Pesticides on Trichogramma dendrolimi Matsumura

为利用松毛虫赤眼蜂防治烟草主要害虫烟青虫,测定了推荐用于防治烟草烟青虫的5种化学农药对预蛹期和成蜂期松毛虫赤眼蜂的毒力。结果表明:农药对预蛹期赤眼蜂的毒力相对成蜂期较小,5种农药中,氯氰菊酯、高氯·甲维盐和溴氰菊酯对预蛹期赤眼蜂的毒力相对较小,LC50值分别为11.117、11.233和11.756 mg/L。此外,氯氰菊酯对成蜂期赤眼蜂的毒力最小,LC50值为1.696 mg/L。

In order to control main tobacco pests Helicoverpa assulta by Trichogramma dendrolimi Matsumura, it determined the toxicity of five recommended chemical pesticides for controlling Helicoverpa assulta on Trichogramma dendrolimi Matsumura in prepupa stage and adult stage, respectively. The results showed that in comparison with adult stage, the five chemical pesticides had relatively less toxicity on Trichogramma dendrolimi Matsumura in prepupa stage; among five chemical pesticides, cypermethrin, cypermethrin + emamectin benzoate and deltamethyrin had relatively less toxicity on Trichogramma dendrolimi Matsumura in prepupa stage, their LC50 value was 11.117, 11.233 and 11.756 mg/L, respectively. Moreover, the cypermethrin had the least toxicity on Trichogramma dendrolimi Matsumura in adult stage, its LC50 value was 1.696 mg/L.