1, prevention-based, try to reduce the number of medications.
2, to rotate the medication to prevent drug resistance.
3. Use high-efficiency, low-toxic and low-residue pesticides according to the operating procedures.
4. Use safe pesticides for watermelons. The following pesticides with obvious phytotoxicity to watermelon cannot be used: phoxim, double-effect polyester, pyrethroid, insecticide, trichlorfon.
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