Guo Dashu is a well-known big fan in the village. He loves to brag, can't talk, and can't listen to what others say. Now many people are not willing to believe him. This year, I planted two acres of cucumbers. From the management of the growth, it looks really good. This is the number that can be ranked in the village. But he just loves to brag. Once he competed with the villagers, he said this year’s cucumber. Can increase by 20% over last year. The villagers said that they went to his friends to see what it was. When they went to the ground, the villagers found that there was something wrong with him. The white powder appeared on the leaves, and the villagers advised him to hurry and prevent him. Face, he said that it can still be 20%, and the villagers are very helpless to leave. After two days, I went to the ground and saw that the powdery mildew was more serious. Guo Dashu began to worry. I was originally looking for help from the villagers, and I couldn’t open my face. I had to contact a senior agronomist for help. Cucumber powdery mildew prevention and treatment methods: Powdery mildew is slowly diffused from the lower part to the upper part, and it is especially important in the early stage of prevention and treatment. Therefore, a protective agent is mainly used before the onset of the disease. It is recommended to spray oxystrobin + chlorothalonil 750 times, it can be, 12 days - 15 Spraying once a day can delay the onset of powdery mildew, or prevent the occurrence of powdery mildew in advance. If powdery mildew occurs, it is necessary to spray the therapeutic agent for control, and then apply a protective agent, such as 42.8% flubenzol, or flurazepam + pyraclostrobin. These are prevention and treatment. The most effective agent for powdery mildew. Put it on 1-2 times, first control the powdery mildew, and then protect it with a protective agent. While controlling powdery mildew, we must pay attention to the humidity in the field. The occurrence of powdery mildew is because the humidity in the field is high and low. This is the most likely time to happen. Therefore, we must control the humidity. The dry and wet alternates should not be too frequent, that is, When you enter the melon period, the number of watering must be more, keeping the soil moist. It can also alleviate the occurrence of powdery mildew. Guo Dashu has a bottom in his heart, and hopes that cucumber will have a real increase of 20% this year.
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