What is the reason for the new white hair?

Cucumber planting melon, there are often a variety of diseases, which do not plant cucumber growers always find white-haired cucumbers in the field, what is the reason, is infected by what diseases, or physiological diseases. Together to find the next cause, and correct and effective prevention and control methods.

1. Reason

Cucumber white hair is actually due to cucumber sclerotinia disease, from the seedling stage, the whole growing period can occur, the base of the disease is serious. This is a disease caused by fungi, mainly soil-borne diseases, sclerotia will spend the winter and summer in the soil. Seeds can spread with bacteria, sometimes producing ascospores, which can spread with the air flow. Flowers are damaged, and when they fall off, they can be infected when they touch the stems and leaves. Cruciferae and Solanaceae are seriously ill vegetables.

2. Symptoms

Melon damage, umbilical water-immersed disease spot, soft rot, flocculent hyphae on the disease spot. Stem damage, is also a water-immersed disease spot, spread, the color becomes light brown, begins to rot, long white flocculent hyphae. There is a sclerotia inside the stem, which will eventually wither and die. Seedling infection, the base around the water-immersed disease spot, will be quenched, when warm and humid, the disease has a white sclerotia, and then black.

3. Prevention

Flood-drought rotation, soaking paddy fields in idle period, or in summer, turning deeply after harvest, can also soak in water. To prevent seeds from carrying bacteria, rinse seeds with 10% salt water several times, sterilize, or dry seeds, and spray 50% carbendazim 400 times solution. Or soak the seeds in hot water. Soil disinfection, 50% chlorpromazine 500 times solution, or chlorothalonil solution.

4. Prevention and cure

When medications are used for the onset of the disease, the common ones are 50% Kaiser 500-fold solution and 40% Shijiale 500-fold solution. Then you can add 2000 times silicone solution, and then spray the disease department, probably once a week or more than once a week, three times in a row, the effect is better, but depending on the situation, good results can reduce the number of use.

Cucumber long white hair is generally due to the influence of Sclerotinia sclerotiorum, which is easy to infect and re-infect. If prevention and control is timely, it can be avoided. It is a frequent disease.