Tomato gray mold is a relatively serious and common disease on tomato, and some of the leaves, stems and fruits in the shed are diseased. The year of low temperature and continuous rainy weather is a serious hazard. When the disease is severe, the diseased leaf is dead, the diseased branches are broken, and a large amount of burnt-out and rotten fruit are directly affected.
Control methods:
1. It is necessary to increase the temperature of the greenhouse and reduce the humidity in the greenhouse by strengthening ventilation and temperature management. That is, when the greenhouse temperature rises to 33°C and the temperature rises to 33°C, the top wind is released. When the temperature of the shed is reduced to 20°C, the ventilation openings are closed, the temperature of the night shed is maintained at 15°C-17°C, and the ventilation openings are opened on cloudy days.
2. Watering should be carried out in the morning. Control watering at the beginning of the disease to prevent condensation.
3. Remove diseased leaves, collateral branches, and diseased fruits in time after onset and focus on burning or burying them deeply to avoid human transmission.
4. Control of Tomato Botrytis cinerea:
Premedication medication. The tomato seedlings were sprayed with 50% SuoQing wettable powder 1500 times liquid or 50% carbendazim wettable powder 500 times, and disease-free seedlings were required to enter the shed.
Spend time with medicine. When the first fruit is blossoming, add 0.1% of 50% Skolin WP or 50% carbendazim WP to dip or smear in a well-prepared 2.4-D or anti-droplet diluent. Make floral medicine.
Pour fruit water one day before medication. Use 65% Trimethasone WP 800 times or 50% carbendazim WP 700 times or 50% chlorpheniramine WP 700 times.
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