How to treat tomato gray mold? This problem is one of the many questions that tomato growers have asked, and tomato gray mold is indeed one of the main diseases of tomatoes, especially in rainy days.
The tomato gray mold disease mainly invades the fruit, and the infection is extended by the residual flower and the flower to the fruit or the fruit stalk, so that the peel becomes gray-white water stain and soft and rot; afterwards, a large amount of taupe appears on the fruit surface, the flower bud and the fruit stalk. Mild layer, the fruit loses water and is rigid. Botrytis cinerea also harms stems and leaves. The adult stage lesions are found in the leaves. They develop from the edge to the inside in a "V" shape, and produce the same pattern of depth and lightness. A small amount of gray mold is formed on the surface, and the leaves finally die.
Scientific management
Keep the shed membrane surface clean, increase the light, timely ventilation, and reduce the humidity inside the shed. It is required to maintain a higher temperature in the morning, to atomize the dew on the roof, and to extend the air release time in the afternoon; appropriate warming at night, especially in the middle of the night, to avoid leaf condensation on the plants. Watering should be carried out on sunny days to avoid watering in rainy days. At the same time, it is necessary to control the amount of watering, avoid flooding with large water, and minimize humidity.
2. Clear the sick body in time
Remove the petals and stigma attached to the fruit in time. Diseased leaves, diseased fruits and diseased branches should be removed in time, packed in plastic bags, and taken out of the shed for centralized treatment to prevent re-infection of the bacteria.
3. Do a good job in chemical control
The chemical control method is smoked, sprayed and dust applied. Smoke can be selected with 10% keeling smoke agent or 45% chlorothalonil smoke agent or 15% carbendazim smoke agent, per acre (1 mu = 667 square meters, the same below) medication 200 ~ 250 grams, in the evening Place the cloth and smear it with a dark fire. Immediately close the smoke for 1 night, and open the door for ventilation the next day. Dust application means spraying 5% chlorothalonil dust in the evening with 1000g per acre, and then closed overnight.
The spray can be selected from 40% Baco WP 1500-2000 times solution, 50% Kulinking WP 1000-1500 times solution, 50% phlegm WP 1000 times solution, 70% chlorothalonil wettability Powder or 60% anti-mildew WP ultra-fine powder 600 times solution. The prevention and treatment of the drug should start at the beginning of the disease, and the drug should be administered once every 7 days or so for 2 to 3 times. Spraying should be promptly ventilated after application to reduce humidity. When using 2,4-D or anti-fallin (Tamarine), add 50% keeling WP or 50% phlegm WP 1000 times in the dilution to prevent the bacteria Infection, has a good control effect.
The above is the main prevention and treatment method of tomato gray mold in greenhouse. If you have this trouble, then come to Huinong.com!
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