Major Diseases and Prevention of Tomato in Autumn Facility

Tomatoes account for a large proportion in the cultivation of facilities in autumn. Diseases are the main obstacles affecting the high yield and quality of autumn tomatoes, and prevention and control of autumn tomato diseases is very important.

Botrytis cinerea: In the flowering period, 0.1% of 50% Skoda WP or 50% acetaminophen WP can be added to the medlar liquid, which is very effective. The fruit can also be sprayed, but care should be taken to prevent the bacteria from developing drug resistance.

Viral disease: an outstanding disease for tomato plants in autumn. The sources of toxicity include tomato yellow leaf curl virus, tobacco mosaic virus, and cucumber mosaic virus. A variety of virus diseases may occur in the field due to mixed infection of several toxic sources. Shade nets and insect nets should be used to reduce the temperature of the greenhouses, and to prevent insecticides such as whitefly, aphids, and thrips; timely cultivating and promote root development; watering according to plant and weather conditions to prevent leggy; pay attention to balanced fertilization to prevent premature aging, Strengthen disease resistance; do not smoke when operating in the field, pruning squatting, then whole strains after the whole plant, contact with the diseased plants to wash with soapy water; timely use of swatches, chemicals to prevent transmission of poison pests.

Late blight: It is a devastating disease of tomato. It has the characteristics of acute onset, rapid spread, and rapid epidemic. Once it is onset, if it is not timely and reasonably controlled, it can be extended to a full shed in a short period of time resulting in pulling. Should pay attention to air release, temperature and humidity control, to avoid condensation of leaves or the formation of water film; to avoid watery days after rainy days, after the onset of appropriate water control; found diseased plants choose 72% cream urea? Manganese zinc wettable powder, 68% refined nail cream? Manganese-zinc water dispersible granules, 52.5% fuconate? Furosemide cyanide water dispersible granules, 25% azoxystrobin suspension agents and other agents spray.

Early blight: After the onset of the disease, there are concentric ring-shaped lesions, dark brown, and water-stained. Before and after onset, 70% Mancozeb WP can be used as a 500-fold dilution, or 75% chlorothalonil wettable powder as a 400-fold dilution. Once every 7 days, spray 3-4 times.

Leaf mold: the cultivation of the disease is heavier. Before and after onset, 70% mancozeb WP may be used as a 500-fold dilution, or 50% skeletal WP may be sprayed with 800-1000 dilutions, once every 7 days, and sprayed 3-4 times.

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