Pollution-free vegetable production has received more and more attention. The key link in the production of pollution-free vegetables is pollution-free control of pests and diseases. Non-pollution prevention includes the selection of resistant varieties, reasonable management of fertilizer and water, and adoption of facility cultivation to reduce the occurrence of pests and diseases. The experience of preventing and controlling pests without chemical pesticides after the occurrence of pests and diseases is described below. First, the use of biological pesticides control 1. Bacillus thuringiensis (Bt emulsion). The 1000-fold Bt emulsion can control 1-2 instar larvae of Plutella xylostella, Pieris rapae, and Helicoverpa armigera. 2. Agricultural antibiotics and plant antibiotics. Penicillin and streptomycin are commonly used for the control of bacterial pests and diseases. Nongkang 120 is used to control fusarium wilt of melons and eggplants, and it has good effects on powdery mildew, anthracnose and black spot of vegetables. Control of cabbage caterpillar, spider mites, tea planters, leaf miners, leaf miners, diamondback moth and other vegetable pests available Zi Qi prime. With 20% compound Liuyangmycin can prevent a variety of ticks in vegetables. In addition, Penicillium, bacillus, Beauveria bassiana, Jinggangmycin and so on are also good biological pesticides. Second, the use of plant pesticides control 1. Garlic solution. Peel and crush the skin with 0.5 kg Purple Peel, seal it for 2 to 3 hours, squeeze out the juice, and add 0.5 kg of soap dissolved in hot water. When it is used, 125 kg of water is added to stir into a foam spray, which can prevent downy mildew, powdery mildew, anthrax and so on. 2. Pepper liquid. Take 0.5 kg of chili, add a small amount of water and boil for 10 minutes, then add 0.5 kg of sliced ​​soap. When used, add cold water 125 kg to 250 kg, spray control, the effect is equivalent to garlic. 3. Buckwheat leaves juice. The fresh buckwheat leaves 1.5 kilograms of smashed add 1.5 kilograms of water, filtered to slag, spraying 40 kilograms of water per kilogram of juice. 4. Tobacco powder plus ash. The tobacco leaves and stems were ground to a fine powder, and 1 to 3 parts of tobacco powder plus 3 to 5 parts of plant ash were mixed and sprinkled on the vegetable seedlings to prevent yellow striped triceps and aphids. The effect was good. 5. Nucleus leaf soaking solution. Take 10 kg of fresh walnut leaves, add 0.5 kg of lime, 20 kg of water, and dip into the pit for 48 to 62 hours, and then add 30 kg to 100 kg of water and sprinkle it into the ground. This can effectively prevent underground pests such as cockroaches, wireworms, and cockroaches. Third, the use of other methods to control 40 per 667 square meters of smashed with dried cabbage pupa juice spray on the water, can effectively control the damage cabbage caterpillar. For every 667 square meters, 30 kilograms of fresh cow's urine is used for 30 kilograms to 40 kilograms of water, and it is sprayed on the vegetable plot harmed by the mites at 9 o'clock in the sunny morning, and the effect is better. Add 10 kg of ash to 50 kg of clear water to mix well and soak for 1 day and night. Take the filtrate spray to protect against locusts. Take 1 kg of rabbit feces for 10 kilograms of water Sheng Sheng in the cylinder or barrel sealed brewed 15 to 20 days, poured in the roots of melon vegetable, can prevent tigers.
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