1. Soaking seeds before sowing: Soak seeds with 5-10 mg/kg sodium naphthalene acetate solution for 10-12 hours before raising seedlings, and then rinse them with clean water for sowing. After the seeds sown by germination, the seedlings are neat and robust, the cold resistance is enhanced, and the occurrence of tomato blight can also be prevented.
2. Seedbed use: After tomato emerges, if the seedlings grow weakly and the leaves turn yellow, spray the whole plant with 5-7 mg/kg of sodium naphthalene acetate (plant growth regulator) liquid once, and the seedlings can resume normal growth. When the seedlings enter the middle and late stage, when the temperature in the seedbed is 26-28, spray once with 5-7 mg/kg sodium naphthalene acetate liquid, which can prevent the occurrence of tomato early blight.
3. Use before and after planting: 6-7 days before tomato planting, spray with 5 mg/kg of sodium naphthalene acetate liquid once, which can not only promote growth and strong trees, but also promote early budding of plants. After planting, spray 5 mg/kg of naphthalene acetic acid liquid once every 10-15 days for a total of 2 sprays, which can prevent the occurrence of tomato early blight and virus disease.
4. Use in the full fruit period: When the young tomato fruit grows to the size of an egg, spray the whole plant with 10 mg/kg of sodium naphthalene acetate liquid once, and spray twice, which can promote the expansion of the fruit, thicken the pulp and increase the sugar content .
5. Later use: In the late stage of fruiting, spray the whole plant with 10 mg/kg of sodium naphthalene acetate (plant growth regulator) liquid once, which can prevent premature senescence of the plant, prolong the harvest period and increase the total yield.
