In the autumn, temperatures begin to drop, and greenhouse cucumbers need to be managed early to prevent the occurrence of various diseases.
First, do a good job of ventilation and humidity
Due to the high humidity in the greenhouse, especially in the condition of cucumber leaf surface droplets, downy mildew, keratopathies and other diseases occur rapidly. Therefore, the air humidity in the shed should be reduced to below 80% and maintained for 4 hours. It can inhibit the occurrence of diseases. Artificial ventilation method can be used to open the shed door and side tuyere to enhance the air circulation inside and outside, so that the humidity inside the shed is reduced. Pay attention to the ventilation volume not to be too large, so as not to reduce the shed temperature and affect the normal growth of cucumber.
Second, appropriate increase in temperature inhibits the occurrence of diseases
Downy mildew, anthrax, powdery mildew, and other diseases, the appropriate temperature for onset is between 20°C and 30°C, so control the temperature in the greenhouse above 30°C, and keep it for a period of time, then suppress the occurrence of diseases. Before and after noon, the indoor temperature was controlled at about 40°C for 2 hours.
Third, smoke prevention
Using the evening time, hang a chlorothalonil smoker at intervals from the inside of the shed, then ignite a piece of fire from the inside to the outside, ignite the smoke, and close the shed to prevent the smoke from leaking. Effectiveness can effectively control cucumber downy mildew and powdery mildew in greenhouses.
Importance: 1. Bottle should be used within 60 days of first opening. 2. Keep away from light and moisture. 3. Do not leave in the bathroom to avoid moisture. 4. Tightly replace cap after removing strips from the bottle. 5. Do not remove desiccants or touch test areas. 6. Use within expiration date. Reading the results: Negative: reduce carbohydrates intake or increase excercise. Trace/ small/ moderate: your health is satisfactory and you are burning fat. Large: increase carbohydrates or reduce exercise.
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