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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 results showed that imidacloprid had excellent bioactivity against Rhopalosiphum padi (L.), and its lethal concentration was 0.11 mg / L and 40 mg / L after 48 h treatment The residual activity of wheat earwax was 89.9% at the concentration of 22 days after treatment; 60 ~ 75g of 20% imidacloprid per hm ~ 2 could effectively control the occurrence of wheat ear aphid, and the duration could reach 20 days with manual spraying and misting Have the same control effect. Field application of imidacloprid can increase 11% to 18%.