Green vegetable cultivation is based on comprehensive technical measures, prevention, creating ecological conditions conducive to vegetable growth and not conducive to the occurrence of pests and diseases, scientifically selecting high-efficiency, low-toxic, low-residue chemical pesticides, so that pesticide residues in vegetables are lower than National standards, the following five measures must be taken during the cultivation process.
   First, the good seed off: to choose high-quality, high-yield, resistant to pests and diseases of vegetable varieties.
   Second, the preparation before the good broadcast: 1 , before planting, should be ploughed early, expose the soil, in addition to the net residual roots and branches, eliminate the residual bacteria and insect sources in the soil. 2 , do a good job in seed treatment: use warm water soaking, that is, use 55 degrees of warm water, soak for 15 minutes, you can kill the bacteria attached to the surface of the seed.
   Third, put a good cultivation management: strengthen management, and time Miaoding seedlings, cultivating and weeding, removing diseased plants, controlling the spread of pests and diseases.
   Fourth, put a good fertilization: 1 , the base fertilizer should be based on organic fertilizer, and should be fully decomposed to reduce the introduction of pathogenic bacteria and eggs. 2 , topdressing should be based on decomposed manure and urine, supplemented by multiple compound fertilizers, to prevent excessive application of nitrogen fertilizer. Fertilizer urea, diammonium phosphate and other fertilizers should be discontinued 15 days before harvest . 3 , the rational use of hormones and trace elements, strictly in accordance with the label instructions to use the concentration and dose to prevent excessive phytotoxicity.
   Fifth, put a good prevention and control. In terms of prevention and control, "based on the physical law, bio-pesticide will take the lead, soil-based pesticides will be the supporting role, high-efficiency and low-toxic residual chemical pesticides will help, and highly toxic pesticides will not go down."
   1. Use physical methods to disinfestation. The pollution-free insecticidal yellow tablets are sensitive to yellow by using a variety of pests such as aphids, whitefly, and larvae, and have strong yellowing properties. By using this special yellow with special glue, the pests are trapped.
   2. Try to use biological pesticides and plant pesticides. Using BT emulsion larvae to control cabbage caterpillar, Plutella xylostella; using agricultural streptomycin to control bacterial angular leaf spot, Chinese cabbage soft rot, black rot; using pelagicin to control blight and root rot; ET-107 acaricide prevents aphids.
   3. Scientific use of chemical pesticides. It is necessary to conscientiously implement the "Pesticide Management Regulations" and "Pesticide Safety Interval Term Regulations". It is strictly forbidden to use highly toxic pesticides such as DDT , methamidophos and methyl isoamylphosphorus.
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