75%噻吩磺隆·苯磺隆WDG对RTDS春油菜田一年生阔叶杂草防除效果与安全性  

Efficacy and Selectivity of Thifensulfuron·Tribenuron-methyl 75%WDG on Annual Broadleaf Weeds in Rapid Trait Development SystemSpring Rape

作　　者：高慧 惠向娟 李玮 GAO Hui;HUI Xiang-juan;LI Wei(College of Agriculture and Animal Husbandry,Qinghai University,Xi'ning 810016,China;Key Laboratory of Integrated Pest Management in Agriculture,Xi'ning 810016,China;Academy of Agriculture and Forestry,Qinghai University,Xi'ning 810016,China)

机构地区：[1]青海大学农牧学院,青海西宁810016 [2]青海省农业有害生物综合治理重点实验室,青海西宁810016 [3]青海大学农林科学院,青海西宁810016

出　　处：《杂草学报》2021年第2期64-70,共7页Journal of Weed Science

基　　金：国家重点研发计划(编号:2016YFD0200504-05)。

摘　　要：为明确75%噻吩磺隆·苯磺隆水分散粒剂(WDG)对快速性状开发系统(rapid trait development system,简称RTDS)春油菜田阔叶杂草的防除效果、适宜用量及其对春油菜的安全性,进行田间试验。在春油菜3~5叶期,按照终浓度为22.5、30.0、37.5、60.0 g/hm^(2)的75%噻吩磺隆·苯磺隆WDG制剂量,对春油菜进行茎叶喷雾。结果表明,75%噻吩磺隆·苯磺隆WDG可用于防除RTDS春油菜田一年生阔叶杂草,推荐使用量为37.5 g/hm^(2)(有效成分含量为28.125 g/hm^(2))以上,对藜(Chenopodium album L.)、猪殃殃(Galium aparine L.)、大刺儿菜[Cephalanoplos setosum(willd.)Kitam.]等杂草的防效达到70%以上,使作物增产8.70%以上。施药后20 d和40 d观察发现,油菜叶色与空白对照区无明显差异,油菜在中后期长势正常。综上所述,75%噻吩磺隆·苯磺隆WDG能够有效防除RTDS春油菜田一年生阔叶杂草并对油菜安全。A field trial was conducted to evaluate the efficacy,appropriate dosage and crop selectivity of the formulated mixture of thifensulfuron·tribensulfuron-methyl 75%WDG on broadleaf weeds in rapid trait development system(RTDS)spring rape.The herbicide mixture was applied to the foliage of spring rape at the 3-5 leaf stage at doses of 22.5,30.0,37.5,60.0 g/hm^(2).Thifensulfuron·tribenuron-methyl 75%WDG could be safely used to control annual broadleaf weeds in RTDS spring rape fields.The recommended dosage was above 37.5 g/hm^(2)(corresponding to 28.1 g active ingredient/hm^(2)).This treatment provided above 70%control of Chenopodium album L.,Galium aparine L.and Cephalanoplos setosum(Willd.)Kitam and the increased crop yield by more than 8.7%.At 20 d and 40 d after application there was no obvious difference in the crop leaf color between treatments and the untreated control,and the growth of rape was normal at the middle and late stages.In all,thifensulfuron·tribensulfuron-methyl 75%WDG can control annual broadleaf weeds in RTDS spring rape field effectively and is safe for rape.

关 键 词：75%噻吩磺隆·苯磺隆WDG RTDS春油菜 阔叶杂草 防效 安全性 

分 类 号：S451[农业科学—植物保护]