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麦田化学除草是控制麦田杂草为害,确保小(大)麦丰收的重要田间管理措施之一。小(大)麦田的化学除草大体可分为三个阶段:一是小(大)麦播种后至杂草2叶期前的药剂土壤处理;二是小(大)麦3叶期以后至越冬前的药剂苗后茎叶处理;三是2月下旬小(大)麦返青后至拔节前的药剂苗后茎叶处理。目前麦田使用的除草剂品种比较多,怎样正确合理的选用除草剂呢? 首先,一种杂草如果既可以用苗后茎叶处理的除草剂来防除,也可以用土壤处理的除草剂来防除,那么应该优先考虑使用苗后的茎叶处理剂。这是因为
Wheat field chemical weeding is one of the important field management measures to control weeds in wheat fields and ensure the harvest of small (large) wheat. The chemical weeding in a small (large) wheat field can be roughly divided into three stages: first, soil treatment of a small (large) wheat after it is sown to the soil before the second leaf of weeds; and secondly, Before the treatment of seedlings stems and leaves treatment; the third is in late February after the small (large) wheat to join the post-jointing shoots stems and leaves before treatment. At present, there are more varieties of herbicides used in wheat fields. How to choose proper herbicides? First, weeds can be controlled by herbicides treated with stems and leaves after they are treated. , Then you should give priority to the use of post-emergence stems and leaves treatment agent. This is because