Black anthracnose mostly occurs on the fruits and leaves of pepper, especially mature fruits and old leaves are most likely to occur. The lesions on the fruit were brownish and water-stained. After the enlargement, the depressions were irregularly shaped with slightly raised concentric rings. Numerous dark particles on the lesions are the conidia discs of the germs. There is a wet color change circle around the lesion. The diseased fruit hangs on the branches after drying. The lesions on the leaves were irregularly shaped with brown edges and grey middles.
Red anthrax occurs mostly on young fruit and mature fruits. Lesions yellow brown water stains, depressions. The lesions are densely covered with red-red dots, arranged in a concentric ring, and the surface of the entire lesion overflows with pale red sticky substances when wet.
In the high temperature and humidity, the pathogenic bacteria develop fastest, often causing a large number of fruit in 1-2 days. Any kind of damage to the fruit during storage and transportation is conducive to the occurrence of disease. The more mature the fruit, the more susceptible it is to disease. When the continuous cropping was too dense and partial application of nitrogen fertilizer, the disease occurred more serious. During the fruit collection period, the autumn rain was more severe and the parts of the pepper affected by sunburn were easy to develop.
Second, prevention and control measures
1. Select disease-free fruits and plant seeds. After the harvest, remove diseased plants, diseased fruits, and seedlings and fields for 2-3 years of rotation.
2, improve the cultivation and management measures, appropriate close planting, planting 4000-5000 points per acre, 2 per hole, full base fertilizer, planting before the rain, after planting, pay attention to the cultivator weeding, clearing the gutter drainage, to avoid partial nitrogen fertilizer, appropriate increase in phosphorus Potassium fertilizer to promote plant growth and enhance plant resistance to disease.
3. The diseased fruit and diseased leaves were collected and burned, and the soil was deep-turned in time after harvest.
4. Seed disinfection, soaking in warm water at 55°C for 10 minutes, drying and mixing with ash.
5, the results found that the disease can be sprayed for the first time 2-3 1:1:500 Bordeaux mixture, spray once every 7-10 days. Can also be used 402 antibacterial agent 1000 times and 800-1000 times Daison ammonium solution.
6, do a good job of prevention and treatment of storage and transportation period, careful packaging, avoid damage when handling, into the storage to pay attention to adjust the temperature and humidity, low temperature refrigeration can reduce losses.
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Your body needs them to work properly, so you grow and develop just like you should. They are essential for the normal growth and development of a multicellular organism. Once growth and development are completed, vitamins remain essential nutrients for the healthy maintenance of the cells, tissues, and organs that make up a multicellular organism; they also enable a multicellular life form to efficiently use chemical energy provided by food it eats, and to help process the proteins, carbohydrates, and fats required for respiration.
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