新型低毒杀虫剂防治花生主要地上害虫的初步研究

摘要

研究了几种新型低毒杀虫剂对花生田主要地上害虫蚜虫(Aphis craccivora Koch)和棉铃虫(Helicoverpa armigera Hübner)的防治效果及对花生的增产效果.结果表明:4.5％高效氯氰菊酯乳油防治蚜虫速效性好,药后24h的防效为99.8％；施用2％高渗吡虫啉可湿性粉剂72 h后对蚜虫的防效达到100％,且对花生的增产效果最明显.施用5％氟铃脲乳油4 d后对棉铃虫的防治效果达89.0％～95.0％,且对花生的增产效果最明显.%This paper investigated the control efficiency and yield - increasing effects of several new low - toxic pesticides on the main overground insect pests Aphis craccivora Koch and Helicoverpa armigera Hübner. The results showed that in aphid control experiment, 4. 5% beta - cypermethrin had fast control effect, which was 99. 8% 24 h after spraying; 2% highly penetrative imidacloprid wettable powder against the aphid provided the control efficiency of 100% 72 h after spraying, and had the most remarkable yield - increasing effect. The control efficiency of 5% hexaflumuron against Helicoverpa armigera reached 89. 0% ~95. 0% on the fourth day after spraying, and it had the best yield - increasing effect.