The early autumn vegetable growth is in the summer and autumn, and various pests and diseases are intertwined, which has a great impact on the high quality and high yield of rapeseed. The growth period of the cabbage is short, and the requirements for the use of pesticides are more stringent. High-efficiency, low-residue pesticides must be selected, and the application time must be controlled during the bud period. Chemical control technology for major pests and diseases :
The main disease prevention and control prevention and treatment of early autumn vegetables, anthracnose, downy mildew, soft rot, currently has good effect and can be used 7 days before harvest: 1 initial stage of downy mildew with 72% gram of dew per acre (cream urea manganese) Zinc) 700 times liquid 50 kg spray, once every 7 days, 2 times in a row; 2 at the beginning of the anthrax disease, 80% anthrax Fumex 500 times solution or 75% methyl thiophanate 600 times solution 50 kg spray per acre, every 7 1 time, 2 times in a row; 3) 72% streptomycin 3000 times per acre in the initial stage of soft rot, or 77% can kill 600 times liquid 50 kg spray, once every 7 days, 2 times in succession.
The main pest control and prevention of early autumn vegetable mites pests should generally be applied in the early stages of harm. 1 Plutella xylostella is sprayed with 1.8% Ainochrome (or 1.8% Fuding, 1.8% harmful extinction) 3000 times liquid 50 kg per acre; 2 Cabbage insects are sprayed with 50 kg of 500 times solution of Bacillus thuringiensis (BT) per acre; 3 locusts are sprayed with 50% anti-Poly 2000 times liquid per acre 50 kg; 4 night moth larvae treat both cabbage worms and aphids, killing 3000-6000 times liquid per acre with 20% speed, or 2.5% cyhalothrin 2000 50 kg spray of double liquid; 5 jumping armor also treats beet armyworm larvae, aphids, killing 1500 times solution with 2.5% enemy per acre, or spray 50 kg of high-efficiency cypermethrin 4000 times solution.
Note that pesticides should be used alternately during the growth of the rapeseed. Each pesticide should be used at most once, and the drug should be stopped more than 15 days before harvesting.
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