垄歌防治水稻二化螟及稻纵卷叶螟幼虫的效果研究

摘要

Chilo suppressalis Walker and Cnaphalocrocis medinalis Guenée are the most important insect pests on rice in Southern China.Control effect of 20%Flubendiamide WDG(Longge)and several kinds of insecticides on the larvae of Chilo suppressalis Walker and Cnaphalocrocis medinalis Guenée were studied in the paddy field.The results showed that efficacy of dosage150 g/hm2 of 20%Flubendiamide WDG against Chilo suppressalis Walker and Cnaphalocrocis medinalis Guenée was 86.3%and 92.2% respectively at 3 days after spray.The control effects were 83.1% and 93.8%,respectively at 14 days after spray,which were higher than other insecticides.%二化螟和稻纵卷叶螟是我国南方水稻上最主要的害虫。研究了20%氟苯虫酰胺(垄歌)等药剂对二化螟和稻纵卷叶螟的田间防效，结果表明使用20%氟苯虫酰胺水分散粒剂150 g/hm2，药后3 d的防效分别为86.3%、92.2%，药后14 d的保苗(叶)效果分别为83.1%、93.8%，均略高于康宽和稻腾常规推荐剂量的防效。