Winter tomatoes at the seedling stage are susceptible to damping-off if they encounter low-temperature, rainy weather in successive days. After water-stained lesions appear on the roots and necks of seedlings, the seedlings die. Winter tomato seedlings infected with damping-off disease, rapid infection, rapid spread, occurrence of pestilence, high mortality. Therefore, in the winter tomato seedling stage, attention should be paid to the prevention of damping-off, in order to protect the seedlings, in order to improve the survival rate of planting.

After winter tomato seedlings are planted and survived, the roots are leached once 600-fold with 80% aqueous solution of sodium propionate, or 800-fold with 50% aqueous solution of pentachloronitrobenzene, or 1000-fold with 50% solution of dexalem-ammonium, with 1-1.5 kg per strain. Pour evenly into the soil surrounding the roots of winter tomato seedlings. After each 10-15 days, foliar spray once 600 times 20% copper thiate aqueous solution, or 1500 times 80% aqueous solution of hymexazol, or 800 times 70% aqueous solution of metalaxyl manganese zinc, or 5,000 times agricultural streptomycin aqueous solution, Spray 3-5 times in a row and evenly spray all the leaves. It is advisable to start with water droplets flowing along the stems and leaves to the root and neck.

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