25%甲维·毒死蜱水乳剂对稻纵卷叶螟的防治研究  

Studies on Control Effect of 25% Emamectin Benzoate·Chlorpyrifos EW against Cnaphalocrocis medinalis

作　　者：束兆林[1,2] 缪康[1,2] 赵来成[1,2] 吉木祥[1,2] 姚克兵 何东兵 

机构地区：[1]江苏丘陵地区镇江农业科学研究所,江苏句容212400 [2]江苏省绿盾植保农药实验有限公司,江苏句容212400 [3]江苏省镇江市植保站,江苏镇江212000

出　　处：《江西农业学报》2009年第5期74-76,共3页Acta Agriculturae Jiangxi

基　　金：江苏省重大科技攻关项目(BE2006303);镇江市工业科技攻关项目(GY2008008)

摘　　要：毒力测定结果表明，甲维盐、毒死蜱的比例为1：124时，对稻纵卷叶螟的LC50（18．86mg／L）最低，共毒系数（156．02）最高，增效作用最大。田间试验结果表明，药后7d，25％甲维·毒死蜱水乳剂600—1200mL／hm^2对稻纵卷叶螟的防效为86．40％～94．42％，表现出较强的胃毒、触杀性，与对照药剂毒死蜱乳油、甲氨基阿维菌素苯甲酸盐乳油元显著差异；药后14d，25％甲维·毒死蜱水乳剂600～1200mL／hm^2对稻纵卷叶螟的防效为76．92％-88．00％，与对照药剂毒死蜱乳油的防效（77．17％）无显著差异，显著优于甲氨基阿维菌素苯甲酸盐乳油的防效（55．00％）；25％甲维·毒死蜱水乳剂对稻纵卷叶螟的保叶效果以1200mL／hm^2为最好，达79．24％。25％甲维·毒死蜱水乳剂防治稻纵卷叶螟的适期为卵孵盛期和低龄幼虫高峰期，推荐剂量为900～1200mL／hm^2，施用方式应选择在无露水时均匀细喷雾。The result of the biological activity test showed that the LC50 and cotoxicity coefficient （CTC） of the mixture of emamectin benzoate and ehlorpyrifos at the ratio of 1：124 against the larvae of Cnaphalocrocis medinalis were the lowest （18.86 mg/L） and the highest （156.02）, respectively, indicating this mixture had the greatest synergism. The results of field trials of 25% emamectin benzoate . chiorpyrifes （ 1： 124） EW showed that the mixture reagent had favorable stomach action and contact action. The control effect of 25% emamectin benzoate . ehlorpyrifos EW at the dose of 600 - 1200 mL/hm^2 against the larvae of Cnaphalocrocis medinalis was 86.40%- 94.42% after 7 days, 76.92% - 88.00% after 14 days, which were all much better than that of emamectin benzoate or chlorpyrifes. The leaf protection effect of 25% emamectin benzoate . ehlorpyrifos EW at the dose of 1200 mL/hm^2 was 79.7.4% after 14 days. So 25% emamectin benzoate ~ chlorpyrifes EW at the dose of 900 -1200 mL/hm^2 is recommended for control of Cnaphalocrocis medinalis.

关 键 词：甲维·毒死蜱 稻纵卷叶螟 防治效果 

分 类 号：S435.112.1[农业科学—农业昆虫与害虫防治]