1. sprinkle plant ash: sprinkle dry and pure plant ash on the stems and leaves of melons and vegetables at night. If the stems and leaves are dry, spray some clear water to wet the leaves before spraying, so that snails will not climb on the stems and leaves and bite.

2. Sprinkle lime powder: after the heavy rain, sprinkle a layer of lime powder around the vegetable field, with a thickness of about 3 ~ 5 mm and a width of about 40 ~ 50 cm. Snails that climb vegetables will be salted to death by lime powder.

3. Spraying tea bran liquid: use 1kg tea bran, process it into powder, add 10 ~ 15kg clear water, fully stir and mix, soak it for 8 ~12 hours, take clear liquid, and spray it on the stems when snails are found to harm the stems, leaves and fruits of vegetables. There are also people who specialize in selling molluscicides.