The phenomenon of melon rot in the greenhouse is a very prominent problem that the current melon farmer has encountered. When the melon grows to the size of an egg or a fist, it shows various degrees of decay, resulting in reduced production, wasting manpower and material resources, bringing huge economic losses to the melon farmers and seriously affecting the healthy development of melon production. In response, the reporter interviewed the standing director and deputy secretary-general of the Watermelon and Melon Association of the Chinese Horticulture Society, a member of the melon cultivar appraisal committee of the Ministry of Agriculture, and Professor Zhang Xian, a muskmelon expert from the College of Horticulture, Northwest Agriculture and Forestry University.

Prof. Zhang Xian analyzed the causes of melon melons, and pointed out that the correct time for watering, and attention to greenhouse temperature and humidity management is the key to prevent melon melons. The reason for rotten melon is mainly due to poor ventilation and dehumidification, improper watering period in the shed, or insufficiency of ventilation after watering, resulting in a high humidity environment. Followed by the accumulation of pathogenic bacteria in the shed, melon farmers re-planting in successive years, but do not pay attention to shed disinfection, when the temperature and humidity conditions are appropriate, it is easy to cause rotten melon. In addition, poor cultivation and management techniques are also a major cause of rotten melons.

Zhang Xian pointed out that the prevention of rotten melon should start from the following aspects.

Select good melon farmers to choose the best-selling, disease-resistant high quality varieties. Reasonable supply of fertilizer. After planting the seedlings after the seedlings are transplanted, control the irrigation when the vines reach 40 cm in length, timely planting the seedlings, and promoting the roots to lower the shoots, and then irrigating the water once in the furrows to restore the normal growth of the plants. In this period, the supply of fertilizer and water should be reduced to maintain the steady growth of plants.

Promptly ventilating and reducing the humidity in the shed should be promptly ventilated to reduce the environmental humidity in the shed and promote the healthy growth of the plants. The size of the tuyere should be appropriate. The daytime should be no higher than 35°C, and the best daytime should be 28°C～32°C. It is possible to reduce the humidity in the shed and the lower the humidity in the shed, the better.

Take agricultural measures to improve the disease resistance of melons. Pay attention to the time of watering and the amount of watering. Watering during flowering and pollination can cause diseases. Generally, when the melon grows to the size of walnuts or eggs, proper irrigation is performed, and the plants are promptly ventilated after irrigation. Maintain a low humidity environment in the greenhouse to prevent germs from spreading.

Prevention-oriented, comprehensive prevention

When using pyrimazine and other plant growth regulators to decorate, add a few drops of agricultural streptomycin to the pyrazole solution; and spray the protective fungicide (Dasheng-M45, product) in time before and after irrigation to prevent disease. To prevent and treat medication in time. During the pollination period or within 10 days afterwards, medication should be used with caution to avoid damaging the young larvae. In the later stages of plant growth, fungicides can be used to control 2,000 or imported guaranty sprays.

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