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High temperature and drought days, watermelon pod management
One must supply enough water, and the second is to prevent dry yellow fruit from causing continuous high-temperature drought during the early stage of disease prevention. The greenhouse watermelon grows in a high temperature environment of 50-60°C. Concentrating, absorbing heat and transpiration during the day; cooling, accumulating water and accelerating growth in the evening. If a long drought and water shortage, will affect the normal growth of watermelon. Watering is a top priority for watermelon management. Watermelon needs plenty of water for a lifetime, and water is the primary condition. The nutrients are dissolved in water and the plants can absorb it. The most urgent task is to provide enough water to coordinate the fertilizer and water supply in the field. In the high temperature water supply, it is necessary to pay attention to the timing. After filling, the water should be poured into the water within 15 days. When the temperature is the lowest, it is the best time for irrigation along the ditch. Watering watermelons should be done with clean water, without polluted or stagnant water. Second, we must pay attention to methods: Can not be filled with flood irrigation, flood irrigation will ruin melon roots. It can't dry out suddenly and it will cause melons. If you use a small water pump hose, must be 10-15 cm away from the melon root, if the water add more nutrients, the effect is better. Posted by: Shanghai Agricultural Technology Network High Temperature Environment Watermelon is easy to get "four bugs and one disease". Treatment of locusts can be selected "Impiride", once again the net; rule the red spider with the sea is three orders, clear the Qing; cure cabbage caterpillars with catching fast, dish hi, hitting; governance guaguai with the Austrian green, Haizheng three orders , Ruijinte, Dijuan; Fuxing, Dasheng, and Kasugamycin for controlling powdery mildew. It is necessary to use high-efficiency, low-toxicity pesticides alternately with biological pesticides. Due to the high temperature in the shed, it is not possible to arbitrarily increase the concentration of the liquid medicine so as not to cause phytotoxicity; in addition, it should be applied when the temperature is low in the morning and in the evening.
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