几种除草剂在东北裸燕麦田的应用效果

Weed Control Efficacy and Crop Safety of Several Herbicides in Naked Oat in the Northeast China

[目的]筛选适于东北裸燕麦田使用的除草剂。[方法]以仲丁灵、丙炔氟草胺、苯嘧磺草胺为土壤处理剂,2,4-滴丁酯、硝磺草酮、苯嘧磺草胺为茎叶处理剂,评价不同剂量下对裸燕麦田杂草的防效和对裸燕麦的安全性。[结果]供试的几种除草剂均对裸燕麦产生了一定药害,但生长后期药害症状基本消失。除仲丁灵外,其他处理对杂草的防效均超过80%。50%丙炔氟草胺WP 40 g a.i./hm2、70%苯嘧磺草胺WG 33.3 g a.i./hm2土壤处理和10%硝磺草酮SC 100 g a.i./hm2茎叶处理产量和人工除草对照间没有显著性差异。[结论]上述3种处理具有在裸燕麦田的应用价值。

[Aims] This study aims to screen out a safe chemical weed control method in naked oat fields. [Methods] Weed control efficacy and crop safety of three pre-emergence herbicides（butralin, flumioxazin, saflufenacil） and three postemergence herbicides（mesotrione, 2,4-D butylate, saflufenacil） at 3 dosage levels were evaluated. [Results] Except for butralin, all the other herbicides provided good efficacy（above 80%） against weeds. All the herbicides caused some injury to the naked oat, but the injury symptoms disappeared in the later growth stages. Two pre-emergence treatments fiumioxazin 50% WP at the rate of 40 g a.i./ha, saflufenacil 70% WG at the rate of 33.3 g a.i./ha and one post-emergence treatment mesotrione 10% SC at 100 g a.i./ha performed the best according to the grain yield. [Conclusions] These treatments above have the potential to be applied in the naked oat fields.