摘要
通过室内测定和田间多点试验,明确了吡虫啉对小麦上禾谷缢管蚜[Rhopalosiphum padi(L.)]具有优异的生物活性,处理后48h的致死中浓度为0.11mg/L,40mg/L浓度处理麦株后22天的残留活性为89.9％;每hm^2用20％吡虫啉60～75g可以有效地防治小麦穗蚜的发生为害,持效期可达20天左右,用手动喷雾和弥雾具有同样的防治效果。田间施用吡虫啉可增产11％～18％。
The paper showed that there was an excellent biological activity of imidaclo-prid against Rhopalosiphum padi (L. ) with bioassays and plot experiments. The LC50 value was 0. 11mg/L on the 48h after treatment. The effective residue was 89. 8% on the 22th day in a greenhouse pot test. Its control effect remained for 20 days after application of 12 - 15 g ai/hm2 in the field. The effectiveness of imidacloprid with different methods of application showed no significant difference. The yield of the test plots had increased by 11% -18% over the checked plots.
出处
《植物保护学报》
CAS
CSCD
北大核心
1997年第2期169-174,共6页
Journal of Plant Protection
关键词
吡虫啉
禾谷缢管蚜
生物活性
小麦
imidacloprid, Rhopalosiphum padi, biological activity, control techniques
