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杂草叶龄杂草未出齐天气情况土壤水分含量田间管理杂草叶龄水稻田杂草2~4叶期为最佳防治期,草龄过大,杂草的耐药性增大,用药量必须适量加大,如继续再按常规用量,药效易打折。杂草未出齐杂草的出土时间有差异,对于没有封闭效果的水稻田苗后除草剂药效影响很大。使用茎叶处理的除草剂最佳方法是等到大部分杂草长到2~4叶期再施药。天气情况气温高有利于除草剂被杂草吸收,作用效果好。但不是气温越高越好,气温过高,喷出的雾状液很
Weeds leaf age weeds are not aligned weather conditions soil moisture content field management weed leaf age paddy field weeds 2 to 4 leaf stage for the best control of age, grass age is too large, weeds increased resistance, medication The amount must be increased, such as continuing to press the conventional dosage, easy to discount efficacy. There are differences in unearthed weeds weed unearthed time, for no effect of paddy rice field herbicides efficacy significantly. The best method of using stem and leaf herbicides is to wait until the majority of weeds have grown to 2-4 leaf stages before application. Weather conditions are conducive to high temperature herbicides by weeds absorption, the effect is good. But not the higher the temperature the better, the temperature is too high, the spray of the liquid is very