Pepper rotten fruit prevention and treatment symptomatic
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Sunburn disease rotten fruit high temperature weather, the sun sunny part of the fruit, so that the peel fades and hardens, resulting in grayish leathery spots, thinning of the diseased surface, pulp tissue necrosis hard. In the later period, it is easily infected by other germs, causing black mold and rot. Prevention: Watering should be timely, balanced water supply, and improve the microclimate in the field. It is suggested that the vegetable farmer should keep two leaves and then pick up the heart when he is pruning. This can play the role of sun cooling and reduce the occurrence of diseases.
Umbilical rot disease fruit rotten fruit umbilical damage, dark green water stain spots and rapid expansion, the disease Department shrinkage, late surface depression. It is often blackened or rotted due to parasitic pathogens. The reason is mainly due to the high temperature and drought, the lack of supply of soil moisture, the supply of calcium in sweet (sweet) pepper plants is unbalanced, leading to calcium deficiency in fruits. In addition, partial application of nitrogen fertilizer, will also affect the plant's absorption of calcium, resulting in calcium deficiency in the fruit produce umbilical rot. According to relevant surveys, the disease is prone to occur when the amount of calcium in the soil is below 0.2%. Control: Spray 1% calcium superphosphate solution or 0.1% calcium chloride solution. In addition, if the disease department becomes dark or rot, it can be combined with black mold or soft rot simultaneously.
Soft rot disease rotten fruit was a dark green spot water stains, after the whole fruit soft rot, with bad odor, internal pulp rot, peel white, dry shrink after the fruit is generally hung on the branches, in case of external forces that fall off. Control: Spray 72% of agricultural streptomycin or 50% DT bactericide or 40% of streptomycin sulfate soluble powder or can kill or Garinong and other agents, spray once every 7 days, even spray 2~3 Times. In addition, cotton bollworm, tobacco budworm, and wind and rain are the vectors for disease transmission. It is necessary to use the pyrethroid pesticides to spray and kill insect pests in time and take measures to prevent rain.
Most of the rotten fruits were infected from the pedicles and were stained with grayish-green spots. They quickly turned brown and soft rot. In wet weather, a sparse layer of white mold grows on the surface, and the diseased fruit does not shrink. Other parts of the stem, such as stalks, often water spots brown spots. Prevention and control: At present, there are many epidemics of pepper in the seedling stage, and vegetable farmers should pay attention to strengthening prevention and treatment. Can spray 64% antivirus and 55% Rhizoctonia mixture (15kg water, 30g for each of the two agents), or 58% metalaxyl manganese or 69% ank manganese or 60% Fluorine manganese Zinc, etc., spray once every 7 days, and spray 2 or 3 times.
Botrytis cinerea and sclerotinia rotten fruit Botrytis cinerea and pepper are more common, brownish watery spots appear on the top or peduncle of young fruit, and after the depression is rot, dark brown, and gray mold layer appears on the surface. Sclerotinia developed from the stalk to the whole fruit, showing watery rot, light grayish brown, and other parts have similar symptoms. These two diseases mostly occurred during the period of low temperature and high humidity in winter, but it is occasionally happening that open-air cultivation of spicy (sweet) peppers occurs in the summer even in cloudy days. Prevention: open-air cultivation can be sprayed with sulfacin, sclerotia net or 50% sulfasine and 70% thiophanate-methyl mixed solution (15 kg water, 15 g each of two agents), or 40% sclerotin 50% acetaminophen mixture (15 kg of water, 15 grams for each of the two agents), spraying once every 5 days during the onset, and spraying 2 or 3 times.
Anthracnose Rot fruit is susceptible to disease when it turns red. The water spot was yellowish-brown with round spots, and the center was taupe-brown with a slightly raised concentric ring pattern, often with dark spots. When wet, the surface of the lesion often overflows with a red sticky material; when dry, the diseased part shrinks and forms a film, which easily breaks to expose the seed. The leaves were infected. The water spots began to stain green, and later became brown spots on the edges and light gray spots on the middle. Prevention: Optional spray chlorothalonil, Xinwansheng, spray once every 7 days, even spray 2 or 3 times.
The fruit of rotten rot is damaged and rots, and when the humidity is high, a lot of white mold is born. Control: Spray 50% DT fungicide or 14% ammonia solution, spray once every 7 days, spray 2~3 times.
Black fungus rotten fruit The disease usually begins at the top of the disease, and some start from the fruit surface, the color of the initial disease department becomes lighter. The fruit surface gradually shrinks, accompanied by dark green mold layer, the disease occurs when the fruit is almost mature or mature. Prevention: Spray 50% DT fungicide 500 times or 58% metalaxyl manganese zinc 400 times, spray once every 7 days, and spray 2~3 times.