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一、药性要了解清楚。现有药剂多数是内吸剂。主要靠芽和幼根、幼茎吸收,施药后正遇种子萌发才有效,杂草过大喷药效果则不好。
First, the medicine to understand clearly. The majority of existing agents are internal agents. Mainly by the buds and young roots, young stems absorption, seed germination only after the application is effective, excessive weed spraying effect is not good.