First, plant ash insecticide method. Grass ash is an important farmyard fertilizer, rich in potassium and other minerals, has excellent pest control effect, can be used to control onion fly, root lice, aphids, beetles and so on. First, the soil is applied with 30 to 40 kg of plant ash per acre. It is best to apply it to the planting ditch. After sowing or planting, it can be covered with soil to prevent and control rhizosphere pests. The second is direct application. After the ground ash is ground, it is dew in the morning. Dry sprayed on pests in the affected area, per acre with 1 to 2 kg of plant ash; three is sprayed plant ash, will be 3 kg of ash immersed in water 10 kg soaked for 3 days, filter residue after spraying ash leaching liquid, per acre spray volume 50 kg.
Second, tobacco pest control law. Tobacco is mainly used to control aphids, stink bugs, and fly maggots. Before the preparation, waste tobacco and water shall be weighed according to the ratio of 1:40. The tobacco leaf shall be shredded and soaked in 10 parts of boiling water and covered. After the water temperature drops to about 20°C, the soaked tobacco leaves will be rubbed until When there is no stronger sap, remove the tobacco leaves and continue to rub it in another 10 parts of water. After 4 times of water changing and kneading, the filter slag removes the tobacco leaves and mixes the whole juice for pest control in the field. The spraying amount per acre is about 50 kilograms.
Third, castor leaf insecticide method. The castor leaf has a good insecticidal effect, and there is an effect of organic fertilizer on the crop after spraying. This method can effectively prevent vegetable worms, cabbage caterpillars, maggots, ground tigers, beetles, diamondback moth and other pests. The ramie leaf pod juice can be added with water 3 to 5 times, soaked in the leaf surface after soaking for 12 hours, or the ramie leaves may be dried after being ground into powder and mixed with soil, and castor bean oil may be added to water 5 times and rubbed for 12 hours. . When the application is selected to spray on a sunny evening, 20 to 40 kilograms of liquid per acre, attention must be with the use.
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