At present, biological pesticides suitable for vegetables mainly include Bt emulsion, Aweiduqing, Caifengning, Nongkang 120, HD-1, agricultural streptomycin, and Tianli.
1. Vigorous application of bio-pesticide Bio-pesticide is a pollution-free pesticide after application on vegetables without pollution or residue. For example, using 100-150g Bt emulsion per acre and spraying 50kg of water can effectively control pests such as cabbage caterpillar, diamondback moth, and yellow guarded melon. With 2% agricultural anti-120 water agent 150-200 times liquid, it can prevent melon powdery mildew and leaf spot disease. With 72% agricultural streptomycin 3000-4000 times liquid, it can effectively prevent cabbage, celery soft rot, cucumber bacterial angular leaf spot and so on.
2. Reasonable application of chemical pesticides First, it is prohibited to use high-toxic and high-residue pesticides in vegetable production, such as methamidophos, isocarbophos, carbofuran, 1605, monocrotophos, omethoate, dicofol, iron gram. Second, the symptomatic selection of high-efficiency, low-toxic, low-residue pesticides, such as crystal trichlorfon, phlegm, puffer, virus A, chlorothalonil, keering, carbendazim, phytopath, fast Third, it is to strictly control the concentration of the liquid, the amount of drug per acre and the number of times of application; the fourth is to accurately grasp the safe interval of harvesting, the interval between the last dose and the harvest should be 10-15 days. Above, to ensure the standard of pollution-free vegetables.
3, as far as possible to apply non-polluting plant pesticides, plant pesticides, raw materials, wide source, simple production, not only good anti-disease effect, and no side effects. For example, using 1.5kg of fresh bitter eucalyptus leaves and adding 1.5kg of water, filtering and removing slag, 1kg of juice and 40kg of water spray can control cabbage caterpillars and vegetable mites. Add 1 part of water with 3 parts of skunk leaves, soak for 1-2 days, spray the water immersion liquid and spray it to prevent aphids, cabbage caterpillars, etc. In addition, plants such as garlic, pepper, fish vine, ramie, and onion all contain substances that inhibit pests, and can be used as long as they are processed slightly to control vegetable pests and diseases.

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