噻虫嗪种衣剂对玉米苗期两种粘虫的室内毒力测定  

Laboratory Toxicity Determination of Thiamethoxam Seed Coating against Two Armyworms at Maize Seedling Stage

作　　者：段云[1] 董嘉欣 苗进[1] 陈琦 巩中军[1] 卢春光 武予清[1] Duan Yun;Dong Jiaxin;Miao Jin;Chen Qi;Gong Zhongjun;Lu Chunguang;Wu Yuqing(Institute of Plant Protection,Henan Academy of Agricultural Sciences/Henan Key Laboratory of Crop Pest Control,Zhengzhou 450002,China;Luohe Academy of Agricultural Sciences,Luohe 462000,China;Henan Yunfei Technology Development Co.,Ltd.Zhengzhou 450000,China)

机构地区：[1]河南省农业科学院植物保护研究所/河南省农作物病虫害防治重点实验室,河南郑州450002 [2]漯河市农业科学院,河南漯河462000 [3]河南云飞科技发展有限公司,河南郑州450000

出　　处：《山东农业科学》2023年第1期124-128,共5页Shandong Agricultural Sciences

基　　金：财政部和农业农村部:国家现代农业产业技术体系项目(CARS-03);河南省农业科学院自主创新项目(2022ZC32);河南省农业科学院科技创新团队专项(2022TD31)。

摘　　要：本研究采用胃毒法测定了噻虫嗪悬浮种衣剂(SC)对东方粘虫[Mythimna separata(Walker)]和劳氏粘虫[Mythimna loreyi(Duponchel)]的室内毒力。结果表明,35%噻虫嗪SC有效成分质量浓度在1.12~2.24 g/kg之间对两种粘虫均具有明显的毒力,且在玉米不同苗龄对不同龄期及种类粘虫的毒力均存在一定差异。玉米出苗2周,噻虫嗪SC质量浓度为1.12 g/kg时对东方粘虫2龄幼虫的毒力效果达92.83%,对劳氏粘虫2龄幼虫的毒力效果达57.13%。与劳氏粘虫相比,噻虫嗪SC对东方粘虫的毒力更强。本研究为生产上选用噻虫嗪SC防治玉米粘虫提供了参考。In this study, the gastric toxicity method was used to analyze the indoor toxicity effect of thiamethoxam suspension seed coating(SC) on Mythimna separata(Walker) and Mythimna loreyi(Duponchel). The results showed that 35% thiamethoxam SC had obvious virulence effect on the two armyworms when its mass concentration was between 1.12~2.24 g/kg, and there were some differences in virulence effect on different ages and different armyworms in different maize periods. The virulence effect of 1.12 g/kg thiamethoxam SC on the two-instar larval of M. separata was 92.83% after two weeks of maize emergence, while that on M. loreyi was 57.13%. The toxic effect of thiamethoxam SC on M. separata was more obvious than that on M. loreyi. These results could provide references for selecting thiamethoxam seed coating agent to control maize armyworms in production.

关 键 词：噻虫嗪悬浮种衣剂 东方粘虫 劳氏粘虫 室内毒力 玉米苗期 

分 类 号：S482.3[农业科学—农药学]