As the soil pests live in the soil depths, the pesticidespraying by ordinary sprayer can't enter into soil, It is very difficult to get rid of them.
由于地下病虫害发生在土壤深处，普通施药机械的药液难以深入土层，给防治带来困难。
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The goal was to let farmers precisely target pesticidespraying rather than rain poison on a whole field, which invariably includes plants that don't have pest problems.
To attain good landscaping of cold season admixed lawn, firstly the grass seeds must be fit together optimized; watering, pruning and pesticidespraying must be managed scientifically.