Talking about the occurrence regularity and prevention method of tomato anthracnose

Anthracnose is a common disease in the process of tomato cultivation, and its harm is great. If it is not timely, it will lead to the death of tomatoes. Therefore, all growers should take precautions from seedlings, watering and then to the time of the drug. The following are the rules and prevention methods of tomato anthracnose shared by Xiaobian, and the growers are rushing to collect the cockroaches.

First, the symptoms of tomato anthracnose

The pathogen has latent infestation characteristics, and the uncolored fruit does not show symptoms after the disease, until the fruit matures.

It quickly spreads into a round or nearly circular lesion with a black color and a slight depression, a pathogen conidial disk. When the humidity is high, the surface of the lesion is dense and the needle is large and red.

Second, the incidence of tomato anthracnose

Climate factors. In the cold and rainy season, the disease is serious and there are many rotten fruits. The onset temperature is about 24 ° C, and the relative humidity of the air is over 97%. The dry weather with a temperature above 30 °C stops expanding.

Cultivation factors. Heavy land, low-lying terrain, poor drainage, excessive nitrogen fertilizer, poor planting or poor ventilation, and the plant growth is weak. The pathogen is mainly in the mycelium with the diseased remains left in the soil for wintering, and can also lurk on the seeds.

Third, the prevention and treatment of tomato anthracnose

Agricultural control

Strengthen cultivation and disease management: First, do a good job in clearing the garden after harvest and destroy the sick body. Second, deep turn the soil, combined with the preparation of a large amount of high-quality organic base fertilizer, sorghum deep ditch planting. 3. Tomato is a long-term crop. It should be carefully managed, pruning, smashing, tying vines in time, digging grass to facilitate ventilation and dehumidification in the field, timely harvesting during fruit ripening, improving harvesting quality, and fruiting out of the field. Destroyed in time.

Chemical Control - Chemical Reference

25% difenoconazole suspension (low toxicity) using 30-40 ml / mu spray

32% azoxystrobin benzyl-suspending agents (low toxicity) using 24-48 ml / acre spray

250 g / liter of azoxystrobin suspension (low toxicity) using 1500-2500 times spray

250 g / liter of prochloraz cream (low toxicity) use 1) 250-500 times liquid 2) 500-100 1) soaked fruit 2) spray

30% pentazole-methanol fresh wettable powder (low toxicity) spray with 1000-2000 times liquid

42% trichloroisocyanuric acid WP (low toxicity) using 83-125 g/mu spray

50% prochloraz manganese salt wettable powder (low toxicity) using 60-80 g/mu spray

25% minos and carbendazim WP (low toxicity) using 75-100 g/mu spray

60% Mi Xian·Binson Zinc Wettable Powder (Low Toxic) Use 800-1000 times spray

20% imipenem carbendazim wettable powder (low toxicity) using 500-1000 times spray

62% more manganese-zinc wettable powder (low toxicity) using 600-700 times spray

40% more · Fu · bromoxynil wettable powder (low toxicity) using 100-150 g / a spray

80% mancozeb wettable powder (low toxicity) using 600-800 times spray

50% Chunlei·carbendazim wettable powder (low toxicity) using 75-94 g/mu spray

40% phenyl ether·methyl sulfide wettable powder (low toxicity) using 600-900 times liquid spray

30% benzophene carbendazim wettable powder (low toxicity) using 1000-1500 times spray

60% benzophene thiram double wettable powder (low toxicity) using 100-150 g / ag spray

4% pyrimidine nucleoside antibiotic liquid (low toxicity) using 250-300 ml / mu spray

16% polymycin-resistant granules (micro-toxic) spray with 2500-3000 times

75% chlorothalonil WP (low toxicity) Use 600-800 times spray

Anthrax is a devastating disease. Once the disease occurs, the tomato will seriously affect the yield. The above is a small series of prevention and treatment methods and medication reference for this disease, and I hope to help the growers.

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