1, timely compensation
The foundation fertilizer of watermelon is applied more than enough, but due to the earlier cultivation and covering the film, the ground temperature is high, the decomposition of fertilizer is fast, the plants absorb more, and the loss is also relatively large. Therefore, the defertilizer often appears after sitting on the melon, which leads to premature aging of the watermelon in the late stage of growth. When the watermelon grows up to the size of the egg, 10-15 kg of urea and 5-6 kg of potassium sulfate are applied per acre with water. After that, the fertilizer can be topdressed once according to the growing conditions, and potassium dihydrogen phosphate or urea can also be sprayed. top dressing.
2, remove the first melon
The first melon is removed immediately after sitting, and the second melon is left. The sub-grass does not allow the melon to grow, which can effectively prevent premature aging.
3, security
Watermelon watermelon period has the greatest requirement for soil water content. During this period, the outside air temperature is high. In addition, when the plastic film is covered and cultivated, the root system is shallow, the soil is easily lost, and the water content is too low, causing premature aging. To prevent loss, wheat straw and leaves can be covered in the roots of the plants. After sitting on the melon, the virtual soil under the film around the plant is pressed down to form a small pit. When it rains, it can make the rain seep through the pellicle hole at the base of the plant to the root of the melon root. In addition can also be sprayed with high-efficiency drought-resistant agents, water-retaining agents. When watering, select early morning and evening when the temperature is low.
4, disease prevention and pest control
According to the actual conditions of the local watermelon, it is targeted to spray various agents before or at the beginning of the disease. Watermelon blight can be treated with mancozeb 600 times liquid, or Amistar 1500 times, or antiviral 500-700 times. Watermelon anthracnose can be sprayed with 800-1200 times of the world's high, or 600-750 times of miconazole, or 50% of carbendazim 500 times. Fusarium wilt of watermelon, at the beginning of disease, can be used to irrigate roots with 800-1000 times of 70% of enemy cough, 250 ml per plant, or use 10 g of enemy pine powder to mix 200 g of flour, add water to make a paste, apply to the base of plants . It can also be used 800 times solution Shile, sclerotium net 400 times liquid irrigation. Virus disease, aphid in the growth stage sprayed with Akte 3000-5000 times, cut off the transmission route. At the beginning of the disease, virus treatment such as spraying A500 times virus was used.
5, prevent sunburn
Plastic film mulching late often due to high temperature burn vines cause premature aging, therefore, melon root and melon vines should not be too clean net to make it play its due role in coverage and supportive functions, early maturing species less, can not fight branches of a tree.
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