Tomatoes are advised against gray leaf spot

Tomato gray leaf spot disease is one of the main diseases of tomato. The incidence of tomato gray leaf spot is 100% when it occurs seriously. If it is not timely, it will have a great impact on the yield. Linyi Fertilizer Network Copyright

Linyi Fertilizer Network Copyright

I. Symptoms: Tomato gray leaf spot is mainly harmful to leaves and fruits. At the beginning of the disease, the leaf surface is covered with dark round or irregular small spots, and the posterior along the veins expands to the periphery, showing an irregular shape. The middle part gradually fades to grayish to taupe, the lesions are slightly concave, and the smaller, extremely thin, late Easy to rupture, perforate or fall off. The fruit is infected with large round depressions, white hair, and then gradually brown, and finally black, causing fruit to rot. Linyi Fertilizer Network Copyright

Linyi Fertilizer Network Copyright

Second, prevention and treatment methods: 1. Strengthen field management, increase the application of bio-organic compound fertilizer and phosphorus and potassium fertilizer, spray love and harvest foliar fertilizer to enhance its disease resistance. 2. In the early stage of the disease, spray 52% of the quick water purification agent 1800 times or 68% easy to retain the water retention agent 1300 times, 47% of the ruixiang WP 700 times, 75% chlorothalonil WP 600 times, 7 to 10 days 1 time, continuous prevention 2~3 times. Linyi Fertilizer Network Copyright

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