In the management of cucumber planting, there are many pests and diseases, and once the disease occurs, the yield of cucumber is a big blow. Many cucumber diseases need to be carefully identified to determine the symptoms of the disease. For example, cucumber downy mildew, although it is a common disease of cucumber, it is not so easy to control. Many cucumber growers have entered some misunderstandings in the prevention and treatment of cucumber downy mildew. Today, Xiaobian will tell you about the misunderstanding of cucumber downy mildew, so as to prevent cucumber growers from entering the minefield when controlling cucumber downy mildew.
First, despise cucumber management, pay attention to chemical control
There are three necessary conditions for the occurrence of diseases. The three conditions of plants, environment and pathogens are indispensable. The prevention and treatment of cucumber downy mildew is not feasible. It also requires reasonable plant management and regulation of environmental conditions such as temperature and humidity. In the management process, roots are promoted to make plants robust, and strict control of temperature and humidity is important for controlling downy mildew.
Second, the use of drugs
When selecting the chemical control, according to the non-occurrence period, the initial stage, and the serious period of the disease, the protective agent can be sprayed according to the medication cycle before the disease occurs, such as chlorothalonil, methyl thiophanate, etc. In the initial stage, you can choose to protect and treat the drug. The disease occurs in a serious period. You can choose two drugs to mix and use, which will enhance the control effect, but pay attention to whether the ingredients are in conflict.
3. Mixing of multiple agents when cucumber downy mildew and other diseases are mixed
If the cucumber downy mildew is mixed with other diseases such as anthracnose or bacterial angular leaf spot, bacterial leaf blight, etc., the prevention and treatment process should be distinguished, it is not suitable for one pot end. Cucumber downy mildew is usually mixed with anthrax, so it can be used together in the prevention and treatment. If it is also contaminated with bacterial diseases, it can cure downy mildew and anthrax, and then prevent other diseases. Before using the drug, it is necessary to distinguish the central diseased plant infected with downy mildew and the initial infection source of the disease, and carry out key prevention and control, not only by spraying.
These three misunderstandings are easy for many cucumber growers. Xiaobian puts forward the misunderstanding of cucumber downy mildew, and hopes that all farmers' friends encounter cucumber diseases must solve the problem according to the corresponding measures.
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