The current temperature rises wave-like, accompanied by rainy weather and high humidity, which is the most suitable time for the occurrence of Botrytis cinerea. Whether it is a tomato planted in a northern greenhouse or a tomato planted in an open field in the south, it is susceptible to gray mold under such climatic conditions. Diseases appear on stems, leaves, buds, flowers, and fruits. Diseases on stems, resulting in water-stained brown oval-shaped lesions, covered with a layer of brown mold, severe disease parts withered. On the leaves, the lesions formed "V" shaped lesions on the leaves, which were water-stained and light-brown. They formed shades of dark and light circles and had a gray moldy layer. After the lesions were dry, the diseased leaves withered. Flower buds and flowers are sick. After the white mold layer appears on the petals, buds and flowers rot. After the fruit was damaged, the epidermis was initially gray-white water-stained, and in the medium-term it was soft-brown and rot-like. In the later period, it was covered with an off-white moldy layer and rotted and deteriorated. Flower buds, flowers, and fruits are damaged, resulting in serious drop buds, fruit drop, and reduced flowering rate. The prevention of Botrytis cinerea is as follows: During tomato growth and development, especially during tomato flowering, if rainy days, rain and humidity are high, it is necessary to seize the momentary sunny days and timely spray a 500 times 0.5% solution of Xiaochaicheine, or 800 times the amount of time. An aqueous solution of 40% pyrimethanil suspension, or 500 times 2% aqueous solution of Wuyimycin, or 600 times 65% aqueous solution of bramyhyn wettable powder is used for prevention. At the same time, pay attention to the inspection of tomato stems, buds, flowers and fruits, found that the stems, buds, flowers and fruit on the appearance of gray moldy, it will be every 7-10 days foliar spray once 1000 times 45% of the bacteria Aqueous urea suspension solution, or 1000 times 50% aqueous solution of boscalidamide water dispersible granules, or 800 times 50% aqueous solution of ethylene nucleus WP, or 1000 times the aqueous solution of 50% procymidone WP, or 1000 times 50% Ketolime WP aqueous solution, or 1000 times 50% Mytilen WP aqueous solution, etc., continuous spraying 2-3 times, evenly spray all the leaves, buds, flowers and fruits to start with water It is advisable to drop the beads downwards. If plants are grown in greenhouses in the North, chlorothalonil dust or procymidone aerosol can be used for prevention and treatment. Because Botrytis cinerea is resistant to drugs and is resistant to drug resistance, the drugs must be used interchangeably. Do not use the same drug multiple times in a row to prevent drug resistance and reduce control. If 0.2-0.3% potassium dihydrogen phosphate aqueous solution is added to the liquid, or 800-1000 times aqueous solution of Phosphorus and Potassium No.1 is sprayed, the control effect will be better, and the disease resistance will be enhanced to speed up the recovery of the diseased plants. , And promote flowering results, increase fruit set rate, promote fruit ripening and coloring. In addition, timely removal of diseased stems, diseased leaves, diseased flowers, diseased fruits, and concentration of deep or burned out of the park to ensure the ventilation and ventilation of the park, reduce the humidity in the park, have a good effect on reducing the incidence and reducing the spread. During the fruiting period of tomato flowering, it is necessary to control nitrogen fertilizer application, increase organic fertilizer and phosphorus and potassium fertilizers, and prevent plant growth. This will not only significantly increase disease resistance and reduce disease incidence, but also help diseased plants return to normal growth. In rainy and cloudy weather, the accumulation of water in the garden should be promptly eliminated to reduce the humidity of the soil and the humidity in the garden. It can also significantly reduce the incidence and delay the spread of the disease. Home Dictionary Safe,Home Fingerprint Safe,Bedroom Safety Fingerprint Safe,Home Steel Security Safe Box Ningbo Reliance Security Technology CO.,Ltd , https://www.reliancesafes.com
After Ching Ming, Seize the Optimum Time to Prevent Botrytis cinerea