How to prevent and cure organic cucumber pests and diseases
2023-10-13 11:08:35
In mid-August, the author went to the countryside to understand the occurrence of pests and diseases in autumn in greenhouses. In an organic vegetable cooperative, the common pests and diseases such as cucumber target spot, downy mildew, yellow squash, melon, whitefly, and melon were reported in the shed. The hazard is heavier and the prevention and treatment should be strengthened.
Cucumber downy mildew can occur throughout the growth period, and spreads quickly after the disease occurs. It can be sprayed with 250 times of each of pepper, ginger or purple garlic, sprayed once every 3 days, and sprayed twice. Or before the occurrence, use 2% pyrimidine nucleoside antibiotic liquid 200 times solution, or 47% Chunlei · Wang copper wettable powder 600 ~ 800 times solution, 5 ~ 6 days once, even spray 2 ~ 3 times.
Cucumber target spot disease can choose 41% allicin EC 2000 times solution, or 0.5% amino oligosaccharide water 400-600 times solution, 53.8% copper hydroxide dry suspension 600 times solution, 47% spring thunder? Wang copper can Wet powder 800 times liquid and other spray control.
White powder can be sprayed with 0.3% azadirachtin emulsifiable concentrate 1000 times solution or biological soap 50 times liquid spray. When spraying, pay attention to the uniform spray of the liquid to the leaf surface and the back of the leaf, spray every 5 to 7 days. 1 time. In addition, it is necessary to take a number of physical control measures together to prevent and control, such as the yellow plate trapping, hanging in the facility all year round, can greatly reduce the density of the insect population, and then assist in the prevention and treatment of pesticides, which can basically eliminate whitefly. Cover the insect-proof net, cover the insect-proof net in the vents of greenhouses and greenhouses, block the outside of the whitefly and enter the greenhouse, and use the medicine to kill the whitefly in the greenhouse. In the greenhouse, hang the frequency vibrating insecticidal lamp to trap.
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