4种杀虫剂对小麦长管蚜的田间防治效果

目的]筛选对小麦长管蚜有较好防效的高效新型杀虫剂及合理使用量.方法]采用田间喷雾的方法对麦长管蚜进行防治.结果]药后7 d,20;啶虫脒可湿性粉剂22.5,30和45 ga.i./hm2处理的防效分别为96.15;、99.76;和99.39;,防效与对照药剂相当;25;毗蚜酮悬浮剂60,90和120 ga.i./hm2三个处理的防效分别为96.26;、97.83;和95.35;,防效略高于对照药剂.10;烯啶虫胺水剂22.5,30和45 ga.i./hm2三处理药后7 d的防效分别为62.50;、48.07;和79.51;,极显著低于对照药剂处理的防效,各试验药剂处理对小麦安全,无药害.结论]防治麦长管蚜可用:20;吮虫眯可湿性粉剂22.5-30 ga.i./hm2、25;吡蚜酮悬浮剂60-90 ga.i./hm2、5;吡虫啉可湿性粉剂22.5 ga.i./hm2,加水喷雾防治,对麦长管蚜均表现了良好的防效.

Control Effect of Four Insecticides on Sitobium avenae in Wheat Field

【Objective and Method】The aim of present study was conducted to find out the insecticides with new-type high performance and better control efficiency then its reasonable dosage were applied in field experiments: 20% acetamiprid WP,25% pymetrozine SC,10% nitenpyram AS and 5% imidacloprid WP by spray.【Result】It showed that all the four insecticides were safe and had no medicine harm to wheat.After seven days,the control effect of 22.5,30 and 45 g a.i./hm2 of 20% acetamiprid WP correspond with 5% imidacloprid WP,reached 96.15%,99.76% and 99.39% after seven days,the effect of 60,90 and 120g a.i./hm2 of 25% pymetrozine SC was higher than 5% imidacloprid WP,reached 96.26%、97.83% and 95.35%,the effect of 22.5,30 and 45 g a.i./hm2 of 10% nitenpyram AS was significantly lower than 5% imidacloprid WP,its effect reached 62.50%,48.07% and 79.51%.【Conclusion】Proper amount of 20% acetamiprid WP was 22.5-30 g a.i./hm2,25% pymetrozine SC was 60-90 g a.i./hm2,5% imidacloprid WP was 22.5g a.i./hm2.