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河南信阳、漯河黏虫种群对6种杀虫剂的敏感性

2021-06-29段云李慧玲陈琦雷海霞李之龙邢永胜武予清

植物保护 2021年3期

段云 李慧玲 陈琦 雷海霞 李之龙 邢永胜 武予清

摘要 :采用浸叶法测定了信阳和漯河两地黏虫种群对甲氨基阿维菌素苯甲酸盐(甲维盐)和氯虫苯甲酰胺等6种杀虫剂的敏感性。结果表明:信阳种群对6种药剂的敏感性由高到低依次为:甲维盐、氯虫苯甲酰胺、辛硫磷、高效氯氰菊酯、毒死蜱、高效氯氟氰菊酯,LC50分别为:0.035、0.230、3.566、3.716、5.025、13.315 mg/L;漯河种群的敏感性由高到低依次为:甲维盐、氯虫苯甲酰胺、毒死蜱、辛硫磷、高效氯氰菊酯、高效氯氟氰菊酯,LC50分别为:0.053、0.734、3.081、3.413、13.570、25.067 mg/L。以毒死蜱为标准药剂,甲维盐对信阳和漯河3龄黏虫幼虫都表现出极高的活性,相对毒力指数分别达到143.571和58.132。

關键词 :黏虫; 杀虫剂; 敏感性; 监测

中图分类号:

S 482.3

文献标识码: A

DOI: 10.16688/j.zwbh.2020026

Susceptibility of Mythimna separata field populations collected from

Xinyang and Luohe city of Henan province to six insecticides

DUAN Yun1#, LI Huiling1#, CHEN Qi2, LEI Haixia3, LI Zhilong4, XING Yongsheng4, WU Yuqing1*

(1. Henan Key Laboratory of Crop Pest Control,Key Laboratory of Integrated Pest Management on Crops in the

Southern of North China, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection, Henan Academy

of Agricultural Sciences, Zhengzhou 450002, China; 2. Luohe Academy of Agricultural Sciences, Henan Province,

Luohe 462000, China; 3. Xinyang Academy of Agricultural Sciences, Henan Province, Xinyang 464000,

China; 4. College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China)

Abstract

Susceptibility of Mythimna separata collected from Xinyang and Luohe city of Henan province to six insecticides was monitored by leaf dipping method. The results showed that the sensitivity order of M.separata population from Xinyang to six insecticides from high to low was emamectin benzoate, chlorantraniliprole, phoxim, beta-cypermethrin, chlorpyrifos and lambda-cyhalothrin, with the LC50values of 0.035, 0.230, 3.566, 3.716, 5.025 mg/L and 13.315 mg/L, respectively. The sensitivity order of M.separata population from Luohe was emamectin benzoate, chlorantraniliprole, chlorpyrifos, phoxim, beta-cypermethrin and lambda-cyhalothrin, with the LC50values of 0.0530, 0.734, 3.081, 3.413, 13.570 mg/L and 25.067 mg/L, respectively. With chlorpyrifos as the standard agent, emamectin benzoate showed higher activity to 3rd instar larvae of M.separata populations from Xinyang and Luohe areas, with the relative toxicity index 143.571 (Xinyang population) and 58.132 (Luohe population), respectively.

Key words

Mythimna separata; insecticide; susceptibility; monitoring

黏虫Mythimna separata(Walker)属于鳞翅目夜蛾科,是一种典型的季节性远距离迁飞害虫,也是我国及其他亚洲和澳洲国家粮食作物上的重大害虫。黏虫具有发生范围广、为害世代多、受害作物种类多、产量损失重以及发生为害历史长等特点。在我国除新疆以外,均有发生并暴发成灾[1]。黏虫幼虫最喜食禾本科作物,对小麦、玉米和水稻三大粮食作物的安全生产威胁最大[2]。近几年来,该虫在我国东北、华北、黄淮部分地区多次出现高密度集中为害,对粮食生产造成了严重威胁[3]。2012年黏虫在全国范围内大发生,发生面积达333万hm2,为害程度为近十年之最[4]。

在农业生产中常用的杀虫剂主要是有机磷类和拟除虫菊酯类农药。研究表明,黏虫对拟除虫菊酯类农药已产生了不同程度的抗性,尽管其对有机磷类农药仍较敏感,但长期使用后势必会导致抗药性的产生[5]。……

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