39%氟·松·烯草酮乳油在东北地区春大豆田的应用效果

Control Effects of Fomesafen·Clomazone·Clethodim 39%EC Against Annual Weeds in Spring Soybean Fields in Northeast China

为明确39%氟·松·烯草酮乳油对东北地区春大豆田一年生杂草的防效及最佳用量,采用随机区组试验设计方法进行田间药效试验。结果表明,39%氟·松·烯草酮乳油在有效成分用量为611.0,666.5,722.0和1333.0 g·hm^(-2)的条件下,施药后30 d,对大豆田一年生杂草总的株数防效分别为93.9%、97.0%、98.7%和99.6%,总草鲜重防效分别为96.0%、98.3%、99.1%和99.8%,与空白对照相比,大豆增产率分别为196.2%、203.8%、204.9%和198.1%。由此可知,39%氟·松·烯草酮乳油在本试验剂量下,于大豆1~2片复叶、杂草2~4叶期进行茎叶喷雾处理,对大豆安全,除草效果好,有增产作用,可作为东北地区春大豆田除草剂使用。适宜的施药剂量为105.0~123.0 mL·(666.7 m^(2))^(-1),即有效成分用量为611.0~722.0 g·hm^(-2)。

In order to clarify the control effect and optimal dosage of fomesafen·flomazone·clethodim 39%EC on annual weeds in spring soybean fields in Northeast China.The field efficacy test was carried out by randomized block test design method.The results showed that at 30 days after treatment,the plant quantity control effects of fomesafen·flomazone·clethodim 39%EC at 611.0,666.5,722.0,1333.0 g·ha^(-1)were 93.9%,97.0%,98.7%,99.6%and the fresh weight effect were 96.0%,98.3%,99.1%,99.8%.The soybean yield increased significantly with increasing rate of 196.2%,203.8%,204.9%,198.1%,respectively.Therefore,fomesafen·flomazone·clethodim 39%EC can be used at 1 to 2 trifoliate leaf stage in soybean field by stems-leaves spraying.It was safe on soybean and control effectively weeds with increasing production.So it can be used as the herbicide in spring soybean fields in Northeast China.The appropriate application dosage of fomesafen·flomazone·clethodim 39%EC was 611.0-722.0 g·ha^(-1).