39.8%五氟·丁草胺悬浮剂对水稻移栽田杂草的防除效果  

Control Efficacy of 39.8% Pentafluoro-Butachlor Suspension Concentrate on Weeds in Transplanted Paddy Fields

作　　者：邢艳 万宣伍 张国芝 杨淞杰 唐自然 杜学英 周厚宇 唐玉平 谭康 张伟 XING Yan;WAN Xuan-wu;ZHANG Guo-zhi;YANG Song-jie;TANG Zi-ran;DU Xue-ying;ZHOU Hou-yu;TANG Yu-ping;TAN Kang;ZHANG Wei(Agricultural and Rural Bureau of Guang'an City,Guang'an Sichuan 63800,China;Plant Protection Station of Sichuan Agricultural and Rural Department,Chengdu 610041,China;Agricultural and Rural Bureau of Pengxi County,Pengxi Sichuan 638399,China)

机构地区：[1]四川省广安市农业农村局植保植检站,四川广安638000 [2]四川省农业农村厅植物保护站,成都610041 [3]四川省蓬溪县农业农村局植保植检站,四川蓬溪629100

出　　处：《植物医生》2021年第3期58-64,共7页Plant Doctor

基　　金：重庆市科委重点项目(CSTC2018JSCX-MSZDX0047);国家烟草专卖局重大专项(110201601025LS-05).

摘　　要：四川水稻田恶性杂草种类繁多、杂草易反弹、二次出草速度快,严重制约着水稻的生产.本文分别在蓬溪县和广安区开展了39.8%五氟·丁草胺悬浮剂对移栽稻田杂草的田间防除试验,分别比较了移栽后5 d和10 d施药后药剂对杂草的防除效果.结果表明,施用不同浓度的39.8%五氟·丁草胺悬浮剂,在药后15 d,30 d和45 d对稗草(Echinochloacrusgalli)、异性莎草(Cyperus difformis L.)、陌上菜(Lindernia procumbens)和其他阔叶杂草防除效果均可达90%以上.在相同施药时间条件下,药剂施用浓度越高,防除效果越好;在相同施用浓度条件下,越早施药,防除效果越好.与清水对照和对照药剂55%苄嘧·苯噻酰干悬浮剂相比,施用39.8%五氟·丁草胺悬浮剂后水稻产量显著增加,移栽后5 d施用药剂剂量为2250 g·hm^(-2)(有效成分为895.50 g/hm^(2))时,蓬溪县和广安区试验田最大增产率分别达12.42%和12.54%.本研究旨在为四川省稻田恶性杂草科学、高效化学防除及治理提供科学依据.There are many kinds of malignant weeds in paddy fields in Sichuan,and they are likely to re-growquickly after weeding treatment,which seriously restricts the production of rice.In order to provide a guidance for the scientific and efficient chemical control and management of malignant weeds in paddy fields,control experiments were carried out in Pengxi County and Guang'an District of Sichuan,in which 39.8% pentafluoro-butracholide suspension concentrate(SC)was applied to transplanted paddy fields,and the control efficacy of the agent on weeds recorded 5 and 10 days after seedling transplanting was compared.The results showed that the control efficacy of 39.8% pentafloro-butachlor SC on barnyard grass(Echinochloa crusgalli),heterosedge(Cyperus difformis L.),strangleweed(Lindernia procumbens)and other broad-leaved weeds was as high as 90% or more as investigated 15,30 and 45 days after application.With the same date of herbicide application,the higher the concentration,the better the control efficacy;and with the same herbicide concentration,the earlier the application,the better the control efficacy.Compared with the untreated control and the control herbicide 55% benzozoyl dry suspension agent,application of 39.8% pentafluoro-buchloride SC significantly increased rice yield.When applied 5 days after transplanting with a rate of 2250 g/ha(the active ingredient was 895.50 g/ha),39.8% pentafluoro-buchloride SC gave a maximum yield increase rate of 12.42% and 12.54% in Pengxi County and Guang'an District,respectively.

关 键 词：复配除草剂 39.8%五氟·丁草胺悬浮剂 稻田杂草 防除效果 

分 类 号：S451.21[农业科学—植物保护]