How to deal with premature aging of watermelon?

[ Agricultural Products Network] What is the cause of premature aging of watermelon ? How to deal with premature aging of watermelon ? For farmers who grow watermelons, similar questions are often consulted. The following is a detailed introduction for you, hoping to help farmers to cope with the premature aging of mulch watermelon.

First, de-fertilization

The cultivation of watermelon is generally more suitable for the application of base fertilizer. However, due to the covering of the mulch film, the ground temperature is high, the fertilizer is decomposed quickly, the plant is absorbed more, and the loss is also large. Therefore, after the melon is taken, the fertilizer is degraded, leading to early premature aging of the watermelon.

Solution: When the watermelon grows to the size of the egg , 667 m 2 is applied with 40 kg of urea and 5 kg of potassium dihydrogen phosphate. According to later plant growth, once again dressing or foliar spray 2-3 times, the choice of fertilizer urea and potassium dihydrogen phosphate mixture, Penshibao, leaf treasure, high yield Ling, bamboo plant license Growth agent and Hexin liquid fertilizer.

Second, sitting melon early

Watermelon usually has the first female flower in the main vine 7-8, and the female vine in the 6~8 knot. In the future, both the main vine and the vine are 1 female flower every 7-8 knots. When the first female flower appears, it is the time when the melon is beginning to grow. If the first melon is kept, it will consume a lot of nutrients, which will affect the growth and development of the melon, and it is easy to form an "old little ape", causing premature aging. And the little melon.

Solution: The first melon is removed in time, and the second melon is left. The vine is not allowed to bear the melon, which can effectively prevent premature aging. According to the test, the first melon yield of the second melon is increased by 50%-70%.

Third, the failure

Watermelon has strong drought tolerance, but drought will affect plant growth and fruit development. During the fruiting period, the water content of the watermelon is required to be 75%. If the soil is dehydrated and the water content is too low, it will cause premature aging.

Solution: Watering in the morning and evening when the temperature is low; in order to prevent the roots of the plant from being lost, the leaves and weeds can be covered at the root of the plant; after the watermelon is sitting on the melon, the virtual soil under the membrane around the plant is pressed down by hand. It will form a small basin. When it rains, the rainwater will penetrate into the root of the watermelon along the small hole of the plant's base to prevent serious loss of mites. Spray high-efficiency anti-drug and water-retaining agents, such as “Wanjiabao”.

Fourth, the disease

In the late growth stage of watermelon, it is very rainy season, and various diseases are very easy to occur. When the disease occurs, the leaves are damaged, and photosynthesis is blocked, premature aging occurs.

Remedy: Take the principle of “anti-healing treatment” and “prevention of treatment, treatment and treatment” for watermelon diseases. According to the characteristics of the disease and easy onset of the disease in the region, it is targeted before or during the onset of the disease. Spray various agents. Watermelon anthracnose can be sprayed with 70% methyl thiophanate WP 600 times solution, or 50% carbendazim powder 500 times solution or 75% chlorothalonil WP 600 times solution, or 50% thiram double WP 300 ~400 times liquid. Watermelon blight, can be made with 50% carbendazim or 70% methyl thiophanate 1.3 kg into a 1:50 times of the soil, before the planting ditch applied to the soil. In the early stage of the disease, 50% carbendazim WP 500 times solution, or 70% dikesone 800~1000 times solution can be used to fill the roots, 250 ml per plant, or 10 g of dixon powder can be mixed with 200 g of flour , add water Pasted into the base of the plant. Or rooting with anti-tanning or double-effect spirit, both preventive and therapeutic effects. Watermelon virus disease, sprayed with 10% imidacloprid 2500 times solution to kill the virus-transmitting aphids and Laodelphia. In the early stage of the disease, spray the virus A500 times and the yellow leaf enemy 800 times mixed liquid, spray once every 5-7 days, even spray 2-3 times.

Five, daily burning

When the watermelon is about to mature, it is prone to daily burning due to full exposure to the sun, causing the melon to decay prematurely and losing the value of the commodity.

Solution: Cover the melon with leaves, weeds, etc.