论文部分内容阅读
入春以后,气温回升,麦田返青,各种杂草也开始旺盛生长,影响小麦的生长发育。因此,春季麦田化学除草至关重要。为了提高化除效果,避免作物遭受药害,化学除草要注意作好“选、控、定、防”四项工作。1.选即选用合适的除草剂。要根据田间杂草发生的具体情况,选择适宜的对小麦安全无害的除草剂,做到对草下药。防除大巢菜每亩用20%二甲四氯水剂200～250毫升,或72%2,4-D 丁酯乳油50～60克,兑水40～50千克喷雾,可兼除牛繁缕、荠菜等多种双子叶阔叶型杂草。防除猪殃殃每亩
After the spring, the temperature rose, the wheat fields turn green, all kinds of weeds began to flourish, affecting the growth and development of wheat. As a result, chemical weed control in spring wheat fields is crucial. In order to improve the effect of chemical removal and avoid crop injury, chemical weeding should pay attention to the four tasks of “selecting, controlling, determining and preventing”. 1. Select the appropriate selection of herbicides. According to the specific circumstances of the occurrence of weeds in the field, select the appropriate safe and harmless to wheat herbicides, herbs under the herbs. Control of large vetch with 20% per acre with 20% dimethyl tetrachloride 200 ~ 250 ml, or 72% 2,4-D butyl ester EC 50 ~ 60 grams, watered 40 ~ 50 kg spray, , Shepherd’s purse and many other dicotyledonous broad-leaved weeds. Control of calamus per mu