Cucumber planting: pay attention to control cucumber sclerotinia

In recent years, with the widespread promotion of greenhouse vegetable cultivation models, cucumber has become one of the main vegetables in the annual supply. However, the disease has become a major obstacle affecting the yield and quality of cucumber. Therefore, how to effectively control the cucumber disease in greenhouse is a common concern of the vegetable farmers. The following is a description of the identification and prevention of cucumber sclerotinia in Huinong .

First, the performance of cucumber sclerotinia disease.

Most of the cucumber fruit is damaged in the top part of the residual flower, and the white hyphae grow, and the stem and the fruit have a silky white covering. Cucumber vines are mostly affected at the base, and water-stained lesions first appear, gradually expanding to make the vines to pale brown, and gradually soft rot, producing white flocculent hyphae and black rat fecal sclerotia. Cucumber vine epidermis longitudinally split, the upper part of the lesion gradually dried up. The leaves are watery and rotted, and white fluffy hyphae grow, which eventually leads to leaf rot.

Second, cucumber bacterial disease prevention and treatment methods

1. Select resistant varieties. Excellent varieties with good disease resistance and high yield should be selected.

2, soil disinfection: before sowing or planting in addition to the net leaves, weeds and roots, with methyl thiophanate 500 times solution or double effect 200 times liquid disinfection, killing bacteria in the soil.

3, early prevention and control: should be prevented as soon as possible, once the diseased seedlings should be removed immediately remove the diseased leaves, diseased melons, the plants affected by the vines should be removed in time, brought to the shed outside deep buried or incinerated. Remove the weeds in the shed and destroy the intermediate host. Simultaneous application of decomposed organic fertilizer, and strengthen seedling management, spraying speed Keling 1000 times liquid or methyl thiophanate 500 times liquid for prevention and treatment.

4. Prevention during harvesting: Eliminate the diseased residuals in time, carry out deep-turning and soil disinfection. When the plant is seriously ill, it is treated with Kudiling 1000 times solution or with methyl thiophanate 500 times solution.

5, scientific fertilization: increase the application of decomposed organic fertilizer, while avoiding excessive use of nitrogen fertilizer.

6. Control temperature and humidity: According to different growth and development periods of cucumber, temperature management should be carried out to strengthen the control of cucumber humidity to achieve the environmental conditions for regulating cucumber in greenhouse. At the same time, we should try our best to solve the problem of water shortage caused by raising the ground temperature and reducing the humidity, so that the nutrients are concentrated and supplied to the cucumber fruit to achieve the purpose of high yield of cucumber.

The above are the symptoms and prevention methods of cucumber sclerotinia disease. Farmers' friends can use appropriate doses according to the seriousness of the disease, which can timely control the spread and occurrence of diseases.

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