The cultivation of green vegetables is the adoption of comprehensive technical measures to prevent diseases, and to create ecological conditions conducive to the growth of vegetables that are not conducive to the occurrence of diseases and insect pests. Scientifically select high-efficiency, low-toxicity, low-residue chemical pesticides to reduce the pesticide residues in vegetables. National standards must take the following five measures in the cultivation process.
First, put a good seed off: to use high-quality, high-yield, resistant to pests and diseases of vegetable varieties.
Second, the preparation before the good sowing: 1, before planting, should be plowed early, exposure to the soil, in addition to the net residual roots and leaves, eliminate the residual soil bacteria and insect sources. 2, do a good job in seed processing: use warm water soaking, that is, with a warm water of 55 degrees, soak for 15 minutes, you can kill the seeds attached to the surface of the bacteria.
Third, the good cultivation management: strengthen management, and time seedlings Dingmiao, weeding weeding, removal of diseased plants, control of pest transmission.
Fourth, the good fertilization off: 1, base fertilizer should be dominated by organic fertilizers, and to fully decomposed to reduce the introduction of pathogenic bacteria and eggs. 2. Top dressing should be based on decomposed feces and urine, supplemented by multiple compound fertilizers to prevent excessive application of nitrogen fertilizer leading to leggy. Fertilizer urea, diammonium phosphate and other fertilizers should be discontinued 15 days before harvest. 3, the rational use of hormones and trace elements, in strict accordance with the label instructions the use of concentration and dosage to prevent overdose caused by phytotoxicity.
Fifth, make a good prevention and control. In terms of prevention and control, “based on the physical method, biological pesticides are at the forefront, earth-based pesticides are supporting actors, and high-efficiency, low-toxicity residual chemical pesticides are used to help power, and highly toxic pesticides are not applied to fields.â€
1. Use physical methods to exterminate insects. Non-polluted insecticidal yellow tablets, which are sensitive to yellow by insects such as aphids, whitefly, and leafminer, have a strong yellowing property. By using this special yellow compounded with special viscose, pests can be hunted and killed.
2. Use biological pesticides and plant pesticides as much as possible. Prevention of Pieris rapae and Plutella xylostella by BT emulsion of Plutella spp.; Prevention of bacterial keratoses, Chinese cabbage soft rot and black rot by agricultural streptomycin; Bacterial damping-off and root rot by dingycin; ET-107 acarids control locusts.
3. Scientifically use chemical pesticides. Must strictly implement the "Pesticide Management Regulations" and "Pesticide Safety Interval Regulations" and prohibit the use of methamidophos, methyl isophosphorus and other highly toxic high-residue pesticides.
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