The black-green water-immersed spots appear on the cotyledons of the freshly-watered watermelon seedlings, which quickly rot. When they are severe, the cotyledons rot and even the stems rot and destroy the seedlings. Faced with this situation, the friends of Guaonong need not panic and should take active and corresponding measures to prevent and control them.

First of all, strictly follow each nursery program, and raise the temperature of the nursery, widening the temperature difference between day and night. Do not think that the outside temperature is low at night, and Meng Mengzi blindly increase the temperature of the shed, to avoid the increase in respiratory temperature due to high temperature, resulting in weak seedlings, which gives the opportunity to infect pathogens. Then there is the scientific and rational use of drugs for prevention and control. Chlorobromo isocyanuric acid, cloves chlorate, agricultural streptomycin or copper preparations can be used.

If nursery is carried out again, the nursery shed should be disinfected first, and then the seed, nursery nutrient soil, nutrients (plug tray), grafting tools, etc. should be thoroughly disinfected and the operation of various nursery procedures should be strengthened.

Safety Belt Fittings

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Safety belt fittings

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