为了避免漂移及药害的产生，应把握住施药时的天气情况和严格控制施药量。
In order to avoid floating and harming of herbicides conditions of wea - ther and effective dosage should be rigidly controled.
在喷雾试验中主要以雾滴在作物上的覆盖密度、雾滴均匀程度和施药量为标准。
Test the spray droplet main crops in the coverage density, and uniformity of droplet spray volume as the standard.
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