【摘要】 小区试验证明，吡虫啉对大豆蚜具有较高的防治效果，每公顷用吡虫啉有效成分１５、２２．５、３０、４５ｇ，施药后４周防效仍达７０％以上。以每公顷用量２２．５、３０ｇ进行大面积示范，药后４周平均防效分别为８４．０、８６．７％，产量比氧乐果处理区分别提高９．１、１０．９％。更多还原

【Abstract】 The results of plot experiment showed that imidacloprid at 15g,22 5g,30g,45g AI/ha gave good control effect against soybean aphis, Aphis glycines Matsumura,the control effect was over 70% during 4 weeks after treatment.The results of field demonstration indicated that the average control effect of imidacloprid at 22 5g,30g/ha during 4 weeks after treatment reached 84 0% and 86 7%,respectively,and the production increased by 9 1% and 10 9%,respectively,compared with omethoate.更多还原