Due to low winter temperatures, little rain and water, the degradation of pesticides is slow. The following points should be noted when applying pesticides on winter vegetables:
1. Biological pesticides were used to control cabbage caterpillars, diamondback moths and aphids. Such as abamectin, BT powder and so on.
2. Pesticides with low toxicity, low residue, and short potency should be used, such as chrysanthemum lipids.
3. It is forbidden to use highly toxic and high residue pesticides on vegetables.
4. No pesticide should be applied 7-10 days before harvest to prevent pesticide poisoning.
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