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近年来,化学除草面积迅速增加,由于部分农户对除草剂品种选择、用药量、施药技术和最佳施药时间等技术要领掌握不准,施药以后达不到理想的除草效果,甚至有的施药后对小麦或者后茬作物产生药害,造成不应有的经济损失,因此,麦田化学除草要特别注意以下技术问题。 一、准确选择除草剂 每一种除草剂都有一定的杀草谱,有的杀草谱可能很窄。例如燕麦畏只能防除野燕麦;二甲四氯防除播娘蒿和野油菜效果好,但防除猪秧秧、米瓦罐
In recent years, the area of chemical weed control has rapidly increased. As some of the farmers are not in a position to grasp the technical requirements for herbicide selection, dosage, application technology and optimal application time, the ideal herbicidal effect can not be achieved after application, and even Of the pesticides on the wheat or the crop after the pesticide phytotoxicity, resulting in undue economic losses, therefore, wheat field chemical weeding should pay special attention to the following technical issues. First, the exact choice of herbicides Every herbicide has a certain to kill grass spectrum, and some kill grass spectrum may be very narrow. For example, oatmeal can only control wild oats; dimethoate control sowing Artemisia annua and wild rape good effect, but the prevention of piggy seedling, rice jar