The latest control methods of cucumber gray mold

Cucumber is one of the common vegetables in daily life, which is planted all over the country, but it is often infected by diseases and insect pests in the process of planting, and Botrytis cinerea is one of the common diseases, which will often lead to cucumber fruit infection and rot if not controlled in time. So how to prevent and cure cucumber gray mold? Let's take a look.

1. Symptoms

Botrytis cinerea mainly infects cucumber strips and sometimes infects leaves. The typical symptoms on cucumber strips are infection and decay from residual flowers, with gray-black mold layer on them. The injured part of the leaf begins to infect from the edge, and v-shaped disease spots appear. In order to correctly identify Botrytis cinerea, it can be carried out from three aspects: one is the brown disease spot, the second is the V shape of the disease spot; the third is that there is a gray mold layer on the surface of the disease spot, in which the gray mold layer is the main difference between it and other diseases.

2. The cause of disease

Botrytis cinerea is a typical comparison of low temperature and high humidity. When the temperature is too low, especially when the temperature is lower than 15 degrees at night, its root system will be blocked, its absorption will decrease, and the root hair will fall off for 3 consecutive days, resulting in malnutrition of the aboveground parts and yellowing of the leaf edge. At this time, the bacteria will take advantage of the opportunity to enter, cause disease, melon strips will also appear melon phenomenon. In addition, excessive watering or incorrect watering will lead to stagnant water or high humidity in the field, which will also create favorable conditions for Botrytis cinerea. In addition, the planting density is too large, the field is closed, resulting in poor field permeability, the disease will also occur.

3. Preventive measures

It is necessary to raise the temperature as much as possible and keep the temperature above 15 degrees at night. Only in this way can the seedlings survive the cold night safely and avoid the infection of Botrytis cinerea. At the same time, it is necessary to increase the light transmittance and reduce the incidence of Botrytis cinerea. Watering should pay attention to the amount of water, the amount of water should not be too much, drip irrigation or micro-spray watering can be used to effectively control watering, or high ridge cultivation can not only effectively increase the ground temperature, but also reduce the humidity around the root system. In order to control the planting density, we can prune the branches and leaves properly, increase the conditional permeability and reduce the incidence of disease.

4. Treatment methods

The principle of prevention and control of Botrytis cinerea is to remove the residual body in time, raise the temperature, strengthen ventilation, be treated with drugs, and disinfect the seedlings immediately after the disease, which can be treated with chlorobromoisocyanuric acid spray. On the second day of spraying, strong internal absorption agents must be used to follow up and control, and pyrimidine suspension and pyrimidinamide can be selected for better effect.

The above is the introduction of the prevention and control methods of cucumber gray mold, hope to help you, want to know more related knowledge, please follow us.