摘要
在水稻生长后期,田间褐飞虱百穴虫量6 000～10 000头的大发生形势下,用25%吡蚜酮防治褐飞虱每667 m^2用24g,药后3 d与7d的防效分别为73.69%与64.92%:每667m^2用30 g,药后3 d与7d的防效为78.55%与70.19%,显著优于参试的乙虫腈与烯啶虫胺。建议隔15～20 d再次用药。
When the brown rice planthopper density was 6 000-10 000 insects/100 holes, the activity of 25% pymetrozine SC was tested on brown rice planthoppers in field. The results showed that the control effect of 3 d ,7 d at 24 g/667 m^2 were 73.69% and 64.92%, respectively. And the control effect of 3 d, 7 d at 30 g/667 m^2 were 78.55% and 70.19%, respectively. It was better than ethiprole and nitenpyram. It was recommended that 25% pymetrozine SC be sprayed again after 15-20 d.
出处
《世界农药》
CAS
2009年第5期37-38,共2页
World Pesticide
关键词
吡蚜酮
悬浮剂
褐飞虱
防效
pymetrozine
SC
brown rice planthopper
control effect
