0.3%印楝素乳油防治小菜蛾的田间药效试验

The Field Test of Using 0.3%Azadirachtin Emulsion to Control Plutella xylostalla L.

应用 0 3%印楝素乳油防治小菜蛾的田间药效试验 ,试验结果表明 :0 3%印楝素乳油对小菜蛾具有良好防效 ,施药后 3天的防效达 79%～ 91 9% ,药后 7天的防效分别达 91%～ 10 0 % 。

This paper reports the experiment of using 0 3%azadirachtin emulsion to control Plutella xylostalla L in field The results showed:0 3%azadirachtin emulsion was effective for controlling Plutella xylostalla L After spraying pesticides 3d,it had 79%～91 9% of controlling effect; After spraying pesticide 7d, it had 91%～100% of controlling effect, and it was secure for B oleracea L var acephata f tricolor Hort