Why is cucumber and zucchini susceptible to powdery mildew?
Powdery mildew is a common disease in melon crops, and cucumbers and sorghum in protected areas occur more severely in March and April. Powdery mildew is mainly spread by airflow and rainwater. The suitable temperature is 15 °C~30 °C. Especially when high temperature and drought are mixed with high temperature and high humidity, it is easy to cause powdery mildew. Therefore, powdery mildew is prone to occur in the north vent of the solar greenhouse. Therefore, when managing greenhouse vegetables, do not ventilate too much at the time of ventilation. Even if the indoor temperature is relatively high, it is necessary to ventilate twice to gradually lower the temperature, which is beneficial to the growth of cucumber and scorpion. Can reduce the incidence of powdery mildew. In the place where conditions permit, a windward film can be set at the vent of the roof to reduce the growth of crops caused by ventilation, and can significantly reduce the occurrence of powdery mildew. In the early stage of the disease, it can spray 78% wave·manganese zinc (Kebo) 500 times solution, or 40% Fuxing 4000 times solution, or 10% Shigao 3000 times solution, or 50% Tsuibei 4000 times solution, or 5% 1500 times liquid, it is necessary to alternately apply several pesticides to improve the control effect. Powdery mildew is mainly harmful to the middle and lower functional leaves. It should avoid the growth point when spraying. The front and back sides should be sprayed strictly, sprayed, and mixed with foliar fertilizer . Once the onset of powdery mildew, it is necessary to spray and control the development. Heavy Hex Coupling Nut ,Heavy Hex Jam Nut ,Heavy Hex Nut Grade,Heavy Hex Nut Kunshan Zhonggu Precision Hardware Co., Ltd. , https://www.zgfastener.com