Field management. After the onset of disease, the diseased fruit, diseased leaves and lateral branches were removed timely, burned or buried in a concentrated manner, and littering was strictly prevented, resulting in human transmission.
Critical period medication:
Before the first application, the tomato seedlings were sprayed with 50% fasting WP 1500 times or 50% carbendazim wettable powder 500 times before planting, and the disease-free seedlings were required to enter the shed.
For the second time, take the medicine during the dip: When the first fruit is in blossom, add 0.1% of 50% Skolin WP or 50% fluff to the well-prepared 2.4-D or anti-droplet diluent. Hydrin WP, 50% polymyxin wettable powder, stained or smeared to make floral medicine. In addition, it is also possible to use "Polka Ling" wettable powder alone, with 0.5 liters per gram of hot water, after mixing and cooling, and dipping the flowers. The amount of mu is 13 grams. The third time mastered the medication one day before pouring fruit and water, and then determined according to the weather conditions. In normal years, the medicine can be stopped. In case of rainy weather, the temperature is low, and it can be prevented 1-2 times, interval 7-10 days.
In the beginning period of tomato gray mold in the greenhouse, Tecdo smoke agent is used at a dose of 50 grams per 100 cubic meters; or 10% quick-cock smoke agent and 45% chlorothalonil smoke agent, 250 g smoke per acre. At night, every 7-8 days; once in the evening, you can spray 5% Garrinong dust agent or 6.5% metalaxyl ultrafine dust agent, 1 kilogram per acre, once every 9 days, depending on the condition and attention Other fungicides alternate use.
At the beginning of onset, spray 50% Sucrose WP 2000x, 50% Propionine WP 1500x, 60% Antimicrobial 600x, or 36% Thiophanate Suspension 500 times liquid, spraying once every 7-10 days, spraying 3-4 times.
Since Botrytis cinerea is susceptible to drug resistance, the amount of the drug and the frequency of application should be minimized. When the drug must be used, it should be noted that rotation or alternating and mixed administration should be used. It will help improve control efficiency, reduce costs, and delay drug resistance.
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