The Four Most Common Diseases in Winter Vegetable Planting

After the beginning of winter, temperatures gradually drop, and winter is almost upon us. When planting vegetables at this time, low temperatures often have an adverse effect on vegetable production, and the reduced ventilation time very easily causes the four conditions in the greenhouse to increase, creating conditions for the occurrence and spread of diseases. Below, the editor brings you the four most common diseases in winter vegetable planting. Let's take a look.

1. Leaf spot disease

Also called brown spot disease or small yellow spot, in recent years it has commonly occurred and caused serious damage in cucumber cultivation, especially in winter, when it very easily forms a high-temperature and low-temperature environment, creating favorable conditions for the reproduction and infection of its pathogens. This disease mainly damages leaves, and when it occurs it first starts from the middle leaves and gradually spreads downward, being most severe when the cucumber load is relatively large. The common symptom is yellow-brown spots on the leaves. Because field humidity differs, the spots can be divided by size difference into small spots, large spots and angular spots. This disease can be controlled with agents such as boscalid, benzoyl · prochloraz, fluopicolide · trifloxystrobin, fluopicolide · tebuconazole, and Kangpusen Kaiban.

2. Gray mold

Gray mold is a disease that occurs most severely at low temperatures, and its host range is extremely broad. It can infect 400 kinds of crops, including tomato, eggplant, cucumber, zucchini and Chinese chives. As temperatures drop, gray mold has appeared in vegetables in many areas. It mainly infects plant flowers, fruits, leaves, stems and other parts, mostly starting from the stigma or petals and gradually spreading to the fruit, generally with young fruit suffering the most severe damage. When leaves are infected, it first starts from wounded leaf tips or leaf edges prone to condensation, and spreads inward in a "V" shape along the area between the veins. This disease can be controlled with agents such as procymidone, iprodione, pyrimethanil · diethofencarb, pyraclostrobin · fluopicolide, and Kangpusen Chuhui.

3. Downy mildew

Downy mildew is a typical high-humidity disease. It does not have high temperature requirements, but the low-temperature and low-light environment of winter very easily leads to excessively low humidity in the greenhouse, causing downy mildew to spread. It can harm many vegetable crops such as cucumber, melon, loofah, lettuce and celtuce, and is one of the most serious diseases in vegetable production. Because it harms many vegetables, there are also certain differences when it occurs. It can be controlled with agents such as propamocarb, dimethomorph, fluoxastrobin, dimethomorph · pyraclostrobin, and Kangpusen Runshuang.

4. Late blight

Also called black stalk disease, it is one of the main diseases of overwintering tomatoes, occurring severely in low-temperature and high-humidity environments, especially under conditions of sudden temperature drops, continuous rainy days, severe haze, and low temperature with low light. When it occurs, it can be controlled with agents such as propamocarb, cymoxanil, dimethomorph, fluopicolide · propamocarb, fluoxastrobin, and Kangpusen Runshuang.

  The above is an introduction to the four most common diseases in winter vegetable planting. We hope it can help you. To learn more related knowledge, please keep following us.