胡飞 苏贤岩 胡本进 周子燕 徐丽娜 邱坤 郑兆阳 张启勇 廖辰 王振营

摘要 为筛选出甲维盐与氯虫苯甲酰胺复配防治草地贪夜蛾的最佳配比，采用浸虫法测定了甲维盐、氯虫苯甲酰胺及组合物对草地贪夜蛾的室内毒力，并基于最佳增效配比进行了田间防治效果评价试验。结果表明，甲维盐和氯虫苯甲酰胺复配组合在二者质量比介于2∶8～7∶3范围内表现增效作用，以3∶7时增效作用最大，共毒系数CTC为173。基于该比例加工获得10%甲维盐·氯虫苯甲酰胺水分散粒剂，并以此开展田间防治草地贪夜蛾效果评价，结果表明，施药浓度高于有效剂量37.5 g/hm2時，药后3、14 d对草地贪夜蛾的防效分别达到88%和84%以上，表现出良好的速效性和持效性。甲维盐和氯虫苯甲酰胺以质量比3∶7混配是防治草地贪夜蛾的良好配方。

关键词 甲维盐; 氯虫苯甲酰胺; 草地贪夜蛾; 增效; 防效

中图分类号： S491， S435.132

文献标识码： B

DOI： 10.16688/j.zwbh.2019666

Toxicities and field control efficacy of the mixtures of emamectin benzoate

and chlorantraniliprole to Spodoptera frugiperda

HU Fei1， SU Xianyan1， HU Benjin1， ZHOU Ziyan1， XU Lina1， QIU Kun2，ZHENG Zhaoyang2， ZHANG Qiyong2， LIAO Chen3， WANG Zhenying4

（1. Institute of Plant Protection and Agro-products Safety， Anhui Academy of Agricultural Sciences， Hefei 230031， China;

2. Anhui Provincial Plant Protection General Station， Hefei 230031， China; 3. Anhui Rirane Pesticide and Fertilizer

Biotech Co.， Ltd，Ningguo 242300， China; 4. State Key Laboratory for Biology of Plant Diseases and Insect Pests，

Institute of Plant Protection， Chinese Academy of Agricultural Sciences， Beijing 100193， China）

Abstract

In order to screen out the best mixture of emamectin benzoate and chlorantraniliprole to control fall armyworm， Spodoptera frugiperda， the toxicities of the two insecticides and their mixtures at different ratios （m/m） to S.frugiperda were determined in laboratory by larvae dipping method， and the field control efficacy of the selected mixtures were tested. The results showed that the mixtures of emamectin benzoate and chlorantraniliprole showed different synergistic effect at ratios ranging from 2∶8 to 7∶3 （mass ratio）， and the mixture of 3∶7 showed the highest synergism with CTC value of 173. Based on these results， emamectin benzoate·chlorantraniliprole 10% water dispersible granule （WG） was formulated. At the effective dose of 37.5 g/hm2 and above， the field control effects 3 and 14 days after application were all over 88% and 84%， respectively. Both the quick effect and persistence of the mixture against S.frugiperda were good. The mixture of emamectin benzoate and chlorantraniliprole in the ratio of 3∶7 by mass is a good formulation for the control of S.frugiperda.

Key words

emamectin benzoate; chlorantraniliprole; Spodoptera frugiperda; synergistic; field control effect

草地贪夜蛾Spodoptera frugiperda（J.E.Smith），俗称秋黏虫（fall armyworm），属于鳞翅目Lepidoptera夜蛾科Noctuidae灰翅夜蛾属Spodoptera，是一种原产于美洲热带和亚热带地区的多食性害虫，广泛分布于美洲大陆，可为害多种作物[13]，是2018年联合国粮农组织向全球预警的重要害虫，具迁飞能力强、繁殖倍数高、暴食为害重、防治难度大等特点[4]。2019年1月该虫侵入我国后快速蔓延为害，至10月8日已在26省1 538个县区发生为害，严重威胁着我国粮食安全[57]。

安徽地处我国粮食生产南北过渡带，全省种植结构复杂，作物种类丰富、生长适期长，草地贪夜蛾喜食的玉米、小麦等作物均有种植，自2019年5月17日首次在黄山区发现草地贪夜蛾以来，截至9月3日，全省16市均已发现该虫。……