Lettuce is a common vegetable that many people grow. During the cultivation of lettuce, soft rot often occurs, which has a great influence on its quality, which makes the growers very distressed. How to effectively prevent this disease? Let's take a look at it.

First, lettuce soft rot disease symptoms

Soft rot mainly harms the rhizome of lettuce and the fleshy stem of lettuce. If the fleshy stem is infected, it will be dark green water-soaked spots at the beginning, brown on the back, and finally softened and spoiled. The roots are infected, the roots are light brown, and then softened and spoiled.

Second, the route of transmission and disease conditions

The disease pathogens are spread by rainwater, irrigation water, bacteria-fertilized fertilizers, insects, etc. The onset temperature is 25~30°C, which is generally premature, and the incidence of continuous cropping and low-lying land is heavy. Generally, it is a popular period from mid-October to late November.

Third, prevention and treatment methods

1. In severely ill areas or seriously ill fields, 2-3 years of rotation should be carried out with grass crops. Low-lying fields should be cultivated by sorghum or sorghum. It is strictly forbidden to flood irrigation. The disease should be controlled during the epidemic period.

2. In the early stage of the disease, the spraying of probiotics and Chunleiwang copper was started.

3. During the storage and transportation period, attention should be paid to ventilation and cooling, and the drug should be stopped 10 days before harvesting.

4, pay attention to clearing the ditch in the rain after the rain or after irrigation. In combination with disease prevention and application of foliar fertilizer such as potassium dihydrogen phosphate or boron fertilizer, the plant resistance is improved.

The above is about the introduction of soft rot of lettuce, as a common disease, growers can not cope, must master the symptoms and causes of the disease, once found, it is necessary to take preventive measures immediately to avoid causing greater losses.

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