摘要
为探索咪唑啉酮类除草剂对洁田稻稻田常规杂草和杂草稻的防治效果及不同杂草稻种群对咪唑乙烟酸的耐药性,采用大田试验在不同时期喷施不同浓度的咪唑乙烟酸水剂防治田间不同杂草及室内盆栽试验鉴定杂草稻耐药性。结果表明:咪唑乙烟酸在水稻播后20 d施用,对田间杂草稻具有较好的防效,1 200 mL·hm^(-2)咪唑乙烟酸对田间杂草稻的防效达92.8%。过早施药对杂草稻防效普遍低于90%,过晚施药需加大剂量才能达到较好的防效。咪唑乙烟酸供试中、高浓度对稗草和千金子具有较好的防效,而对多花水苋和丁香蓼等阔叶杂草防效较差。耐药性鉴定结果表明,不同区域的杂草稻种子对咪唑乙烟酸较敏感,未产生明显的耐药性。
The study aimed to explore the control effects of imidazolinone herbicides on common weeds and weedy rice in the fields of clear rice,as well as the resistance of different weedy rice species to imazethapyr.Field experiments were conducted to control various weeds by spraying different concentrations of imazethapyr solution at different stages,and pot experiments were conducted to identify the resistance of weedy rice.The results showed that spraying imazethapyr 20 days after rice seeding controlled weedy rice in the field effectively,with a control efficiency of 92.8%at a low concentration of 1200 mL·hm^(-2).Early application resulted in a control efficiency below 90%generally,while late application required higher dosages to achieve better control efficiency.Moderate and high concentrations of imazethapyr demonstrated good control efficiency against Echinochloa crusgalli and Leptochloa chinensis,but poor control against broadleaf weeds such as Ammannia multiflora and Ludwigia prostrata.The resistance identification results indicated that the weedy rice species from different regions tested were sensitive to imazethapyr,showing no significant resistance.
作者
徐伟东
陆强
姚张良
李友发
富昊伟
张馨月
董俊杰
曹奎荣
马兴华
XU Weidong;LU Qiang;YAO Zhangliang;LI Youfa;FU Haowei;ZHANG Xinyue;DONG Junjie;CAO Kuirong;MA Xinghua(Jiaxing Academy of Agricultural Sciences,Jiaxing 314000,Zhejiang)
出处
《浙江农业科学》
2024年第11期2668-2671,共4页
Journal of Zhejiang Agricultural Sciences
基金
市级农科院联盟区域示范性项目(2023SJLM09)
嘉兴市科技计划项目(2022AZ100003)。
关键词
咪唑乙烟酸
洁田稻
杂草防控
杂草稻种群
耐药性
imazethapyr
clear field rice
weed control
species of weedy rice
resistance
