cause
Low temperature is an important factor in the freezing of wax gourd, especially when it comes to cold currents or sudden cooling or rainfall. At low temperatures, the protoplasts of root cells flow slowly, and the osmotic pressure of the cells decreases, resulting in unbalanced supply and demand of water and freezing damage to the plants.
Control methods
Preventive measures: selection of low-temperature resistant varieties; low temperature training, melons tolerance to low temperature is a physiological adaptation process, the colloidal viscosity of the protoplasm increases, the enzyme activity enhances the development of cold resistance, so the low temperature training before planting seedlings is very important; Select sunny planting, pour small water before frost; use plants to cover newspapers or mulch; sheds surrounding grass curtains; fume or temporary replenishment; spray agricultural streptomycin solution at a concentration of 50010-6, spraying plant resistance per acre Cold liquid 200 ml, or 27% high fat film emulsion 100 times liquid.
Relief measures after freezing: slowly warming after freezing, shaded by newspapers or straw after sunrise, so that the melon physiological function slowly recovers, can not be rushed.
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