摘要
室内毒力测定表明 ,阿维菌素对菜青虫、小菜蛾、菜蚜有很高的毒力 ,L C50 分别为 0 .0 2 2、0 .12和 0 .2 8mg/ L ;对甜菜夜蛾和斜纹夜蛾的毒力较差 ,L C50 分别为 6 7.5 6和 16 5 .73mg/ L。阿维菌素不影响小菜蛾卵的孵化率。小菜蛾幼虫随虫龄增大 ,对阿维菌素的敏感性下降。田间试验表明 ,阿维菌素 4 mg/ L和 8mg/ L对菜青虫和小菜蛾的防效在 95 %以上 ,持效期 10～ 15 d。阿维菌素与高效氯氰菊酯 (1∶ 6 )、与杀虫单 (1∶ 2 99)
The result of the test in laboratory showed that the toxicity of abamectin against Pieris rapae (L.) was very high (the LC 50 was 0.022 mg/L), the toxicity against Plutella xylostella (L.) (the LC 50 was 0.12 mg/L ) and Lipaphis erysimi (Kaltenbach) (the LC 50 was 0.28 mg/L) was less. That the toxicity of the pesticide was quite bad against Spodoptera exigua (Hübner) and Prodenia litura Fabricius, the LC 50 was 67.56 mg/L and 165.73 mg/L, and that the pesticide could not kill the eggs of Plutella xylostella (L.) and the activity to young larvae reduced with increase of larvae age. The result of trial in field stated that control effects of abamectin to Pieris rapae (L.) and Plutella xylostella (L.) at 4 mg/L and 8 mg/L was over 95% and the high effectiveness was maintained for 10~15 days. The binary mixtures of abamectin+ beta cypermethrin (1∶6) and abamectin+monosultap(1∶299) showed synergic activity to Plutella xylostella (L.) and good effect against Pieris rapae (L.) and Plutella xylostella (L.) in field.
出处
《农药学学报》
CAS
CSCD
2002年第1期39-44,共6页
Chinese Journal of Pesticide Science
