乙虫腈10%悬浮剂和吡蚜酮25%可湿性粉剂防治稻飞虱田间药效试验

Efficacy of Ethiprole and Pymetrozine on Rice Planthoppers

灰飞虱和褐飞虱是为害本地水稻的主要飞虱种群,近年来有加重发生的趋势,目前大部分药剂对其已产生较明显的抗性。乙虫腈10%悬浮剂、吡蚜酮25%可湿性粉剂是目前防治这2种飞虱比较理想的药剂,乙虫腈10%悬浮剂使用剂量为60～75ga.i./hm2时,其对褐飞虱20d的防效保持在85%以上,吡蚜酮25%可湿性粉剂使用剂量为75～93.75ga.i./hm2时,其对灰飞虱和褐飞虱均具有较好的持效性。

Brown paddy plant hopper and small brown rice plant hopper were the main harmful hopper groups the region. The efficacy tests of ethiprole and pylnetrozine on rice planthoppers were carried out, The results showed that the Ethiprole 10% SC and Pymetrozine 25% SC were relative ideal pesticides for the control of these two kinds of plant hoppers. The control effect of Ethiprole 10% SC with the dosage of 60-75g a.i./hm^2 on the small brow rice pant hopper was over 85%, The control effect of Pymetrozine 25%WP with the dosage of 75-93.75g a.i./hm^2 haD good efficiency on both brown paddy plant and brown rice plant hopper.