阿维菌素混剂防治蔬菜害虫试验

Application of Mixed Abamectin on Vegetable Crops

３６％辛·阿维ＥＣ２ ０００－３ ０００倍液对小菜蛾防效达８９．７％～９４．９％，其速效性和持效性均明显优于１．８％阿维菌素３ ０００倍液和４０％辛硫磷１０００倍液。１．２％高渗阿维·高氯ＥＣ ４２－５３ｍｌ／６６７ ｍ２，药后５～７天对甜菜夜蛾的防效在 ９０％左右，比两单剂 ０．９％阿维菌素 ＥＣ ５０ ｍｌ／６６７ ｍ２和 ４．５％高效氯氰菊酯 ＥＣ４５ ｍｌ／６６７ ｍ２高出 ２．８～５．９个百分点。２６％毒·阿维乳油 ３ ０００ 倍液，药后 ３～７天对美洲斑潜蝇的防效均在９３％以上。

Field trials showed that mixed abamectin had good effect on controlling the insect in veg- etable crops. Spraying 2 000-3 000 times dilution of 36% phoxim abamectin EC, the effect of controlling Putella xylostella L. was 89.7%-94.9%, it was apparently better than that of 3 000 times dilution of 1.8% abamectin or 1000 times dilution of 40% phoxim. With the dosage of 42-53 ml/667 m2 of 1.2% hyper- tonic abamectin betacypermethrin, the effect of controlling Laphygma exigua Hubner was 90% or so, which was 2.8-5.9 percent points higher than that of applying 50 ml 0.9% abamectin EC or 45 ml 4.5% beta- cypermethrin EC in 667 m2. Against Lriomyza satirae Blanchard, the controlling effect of 3 000 times di lution of 26% chlorpyrifos. abamectin was above 93% afer 3-7 days.