依维菌素和阿维菌素对小菜蛾和美洲斑潜蝇田间防治效果比较

Control Effect of Ivermectin and Abamectin on Plutella Xylostella and Liriomyza Sativae on Field

1 .8 %依维菌素和 1.8%阿维菌素对田间小菜蛾均有良好的防效 ,6mg·L-1液防治药后第 4、7天平均校正防效分别为 94 .92 %和 83 .64%、97.2 6%和 89.0 0 % ;依维菌素和阿维菌素 9mg·L-1防治美洲斑潜蝇药后第 3天 ,高龄幼虫的平均校正防效为 72 .18%和 5 1.4 8% ,低龄幼虫为 90 .4 2 %和 81.2 8% ,总的防效为 81.5 5 %和68.4 3 % ;药后第 7天依维菌素对菜豆上、中、下部叶片的保叶效果分别为 83 .4 6%、67.85 %和 4 2 .90 % ,平均为5 8.2 2 % ,阿维菌素的保叶效果分别为 4 1.69%、4 5 .93 %和 4 3 .83 % ,平均为 4 4 .4 6%。依维菌素对小菜蛾、美洲斑潜蝇的防效及保叶效果优于阿维菌素。

Control effects of 1.8% ivermectin and 1.8% abamectin on Plutella xylostella ,were 94.92% and 83.64%,97.26% and 89.00% of larva exposed to 6mg·L -1 observed 4d or 7d later respectively,and on Liriomyza sativae ,were 72.18% and 51.48%,90.42% and 81.28%,81.55% and 68.43% of 3 instars,1-2 instars or 1-3 instars exposed to 9mg·L -1 observed 3d later respectively.At 7d after exposure to ivermectin,the protective effect for leaves of upper,media and low parts of Phaseolus vulgaris ,were 83.46%,67.85% and 42.90% respectively,and to abamectin was 41.69%,45.93% and 43.84% respectively. Control effect of ivermectin is better than abamectin on controlling Pluterlla xylostella and Liriomyza sativae .