23.5%环磺酮·莠去津可分散油悬浮剂防治玉米田一年生杂草效果与安全性

罗婵; 王宇; 丛克强; 郭玉莲

23.5%环磺酮·莠去津可分散油悬浮剂防治玉米田一年生杂草效果与安全性

Control Effects of Tembotrione·Nicosulfuron 23.5% OD Against Annual Weeds and Security in Maize Field

摘要

摘要: 为明确23.5%环磺酮·莠去津可分散油悬浮剂对玉米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：23.5%环磺酮·莠去津可分散油悬浮剂在有效成分用量为564.0,634.5,705.0和1 269.0 g·hm^-2的条件下，施药后30 d,对玉米田一年生杂草总平均株数防效分别为95.0%、97.2%、99.0%和100.0%;总草平均鲜重防效分别为97.5%、98.9%、99.6%和100.0%,与空白对照相比，玉米增产率分别为99.9%、102.7%、103.0%和103.9%。由此可知，23.5%环磺酮·莠去津可分散油悬浮剂在本试验剂量下，于玉米苗后、杂草2～4叶期进行茎叶喷雾处理，对玉米安全，除草效果好，有增产作用，可作为玉米田主要除草剂使用。推荐的23.5%环磺酮·莠去津可分散油悬浮剂防治玉米田一年生杂草的适宜施药剂量为160～180 mL·（666.7 m²）^-1,即有效成分用量为564～705 g·hm^-2。

Abstract: In order to determine the control effect and optimal dosage of tembotrione·nicosulfuron 23.5%OD on annual weeds in maize field,the field efficacy test was carried out by randomized block test design method.The results showed that at 30dafter treatment,the plant quantity control effects of tembotrione·nicosulfuron23.5%OD at 564.0,634.5,705.0,1 269.0g·ha^-1were 95.0%,97.2%,99.0%,100%and the fresh weight control effect were 97.5%,98.9%,99.6%,100.0%.Compared with the blank control,the maize yield increased significantly,and the yield increasing rates were 99.9%,102.7%,103.0%,103.9%,respectively.Therefore,tembotrione·nicosulfuron 23.5%OD can be used at 2to 4leaf stage of weeds in maize field by stems-leaves spraying.It is safe on maize and control effectively weeds with increasing production.So it can be used as the major herbicide in maize field.The recommended suitable spraying dose of tembotrione·nicosulfuron23.5%OD is 160-180mL·（666.7m~2）^-1,and the dosage of active ingredient is 564-705g·ha^-1.

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