Yellow plate to induce cockroaches: winged clams have strong tropism for yellow and orange yellow, and can be used for trapping and killing with yellow plates coated with mucus such as engine oil No.10. The size of the yellow plate is generally 15-20 cm square, inserted or hung on the vegetable line, and is even with vegetables. Silver gray film avoidance: Aphid has a strong deterrent to silver-gray, silver gray plastic strips can be hung in the field or cover the vegetables with silver ash film to avoid embarrassment. Prevention and control of autumn cabbage locusts can be established immediately after cabbage sown shed, every 0.3 meters vertical and horizontal pull a silver-gray plastic film, covering about 18 days. Washing powder smashing: Washing powder has a strong contact effect on maggots. Therefore, you can use 400-500 times liquid detergent to wipe out the sputum, 60-80 kg of detergent spray per acre, even spray 2-3 times. Plant extermination: (1) ground the tobacco into fine powder, add a small amount of lime powder, and apply it; (2) Soak peppers or wild herbs in water for a day and night, filter and spray them; (3) Disperse the ramie leaves and spread them. Or dip with water 1:2, boil for 10 minutes and then filter and spray; (4) soak the peach leaves in water for a day and night, add a small amount of lime, filter and spray. Plant flooding: Volatile odor of leeks has a repellent effect on locusts, and other vegetables can be planted with leeks. Elimination of Insect Sources: The dead wood, pomegranates, and dried grass near the vegetable fields, the residual diseased leaves and weeds left after the harvest of vegetables are the main wintering hosts of the aphids. Therefore, the vegetables should be thoroughly removed before winter, winter and spring. Weeds near fields. Protection of Natural Enemies: The natural enemies of locusts are the seven-spot ladybugs, grasshoppers, and food flies. They should be protected and used.
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