上栗县稻纵卷叶螟用药药效评价

Evaluation on Field Control Efficiency of Five Kinds of Insecticides on Rice Leafroller(Cnaphalocrocis medinalis) in Shangli

[目的]筛选适合上栗县使用的稻纵卷叶螟的防治药剂。[方法]通过大田试验研究了5种高效、低毒药剂对稻纵卷叶螟的防治效果及对作物的安全性。[结果]药后14 d,15%茚虫威悬乳剂225 g/hm2、4%甲维·氟铃脲微乳剂750 ml/hm2、20%氯虫苯甲酰胺悬乳剂150 ml/hm2和1%甲氨基阿维菌素苯甲酸盐乳油1 500 ml/hm2对稻纵卷叶螟的杀虫和保叶效果均在80%以上,且对水稻生长安全,可在生产上大面积推广并轮换使用;1.8%阿维菌素乳油对稻纵卷叶螟的杀虫效果稍差,已在当地产生抗药性。[结论]为水稻安全生产及科学用药提供了参考。

[Objective]The aim was to screen proper insecticides against rice leafroller in Shangli county.[Method]Five insecticides were selected for field trials against rice leafroller.[Result]On the 14th-day after spraying of 15％ indoxacarb SC 225 g/hm2,of 4％ methylamino abamectin benzoate · hexaflumuron ME 750 ml/hm2,of 20％ chlorantraniliprole SC 150 ml/hm2,and of 1％ methylamino abamectin benzoate EC 1 500 ml/hm2 against the rice leafroller respectivelly,the leaf-protecting efficiency from these four applications were all higher than 80％ and also showed no toxicity on leaf development.These four pesticides could thus be promoted on controlling rice leafroller and recommended to be applied ahemately in the future.1.8％ avermectin EC had poor control efficiency,the rice leafroller has generated resistance to this pesticide in Shangli.[Conclusion]The results provide reference for safe production of rice and scientific application of pesticides.