Grape gray mold spring prevention

Botrytis cinerea is overwintered by conidia or sclerotia on the diseased ear and diseased fruit. When the temperature is above 15 degrees, it begins to spread. The general onset time is 7 to 10 days before the flowering of the grapes, so the fruit farmers regard the occurrence of gray mold as the standard for calculating the flowering period.

Prevention

Comprehensive prevention and control of nitrogen fertilizer, control of length, prevention of frame and shed closure, is the fundamental way to prevent this disease. In the winter and spring, the garden should be carefully and meticulously cleaned up. In the shed, the clearing method or the mulching film is applied before the flower to reduce the air humidity and soil moisture, and the 5 degree stone sulphur mixture is used before germination. Bagging in time for young fruit.

The best time to take the drug is 7 to 10 days before flowering and the fruit drop period. Can be used 50% speed Keling 2000 times or 50% Puhein 1500 ~ 2500 times or 50% Nongliin 500 ~ 600 times have a good prevention and treatment.

In greenhouse grapes, carbendazim and fungicide can also be used as control agents, and Bordeaux mixture also has a certain preventive effect. When using the medicine, it should be thoughtful and meticulous. The water consumption per acre of the machine spray is about 250 kg; the manual sprayer uses about 150 kg of water. Insufficient amount of syrup is used, and the control effect is not good.