How to prevent and treat common physiological disorders of eggplant in low temperature and low light period?
1. Yellowing of young leaves. The young leaves are bright yellow and white, the tips of the leaves remain green, and rust-colored streaks appear on the middle and lower leaves; control: spray 500 times solution of ferrous sulfate on the leaves; apply magnesium hydroxide and lime in the field to adjust the pH of the soil; supplement potassium It is known to balance nutrition, satisfy or promote iron supply.
2. Flower buds are not open. Control: Spray 700 times solution of borax or amino acid polypeptide pollinator on the leaves.
3. The fruit is stiff and cracked. The fruit is stiff without swelling, the skin color is dull, there are white stripes, the fruit is cracked after watering, it does not grow big, and the quality is poor. Control: Phosphate fertilizer is mainly applied under the roots of seedlings during planting, and 2 to 3 kg of pure phosphorus per acre is applied in the later stage; potassium fertilizer is mainly applied in the fruiting period.
4. Falling leaves and fruits. The joints between the petiole and the stem, and the fruit stalk and the fruit formed a separation layer and then fell off due to lack of auxin. Prevention: Spray 700 times solution of zinc sulfate on the leaves of aging seedlings, or apply 1 kg of zinc sulfate per mu, or spray the leaves with vegetable fruit zhuangdiling and other nutrients to prevent falling and promote growth.
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