Prevention and Control measures of Nutrition deficiency hindering the growth of eggplant

Eggplant needs to absorb a variety of nutrients in the process of growth and development. the physiological diseases caused by the lack of certain nutrients are called eggplant deficiency or nutritional disorders.

Eggplant nitrogen deficiency

Nitrogen deficiency disorder: when eggplant is nitrogen deficient, the leaf color becomes lighter, the old leaf yellowes, when it is heavy, it dries up and falls off, the bud development stops and turns yellow, and the heart leaf becomes smaller. Prevention and control measures: when preparing the soil, apply sufficient basic fertilizer, especially farm manure; during the growing period of eggplant, avoid stagnant water in the field; when nitrogen deficiency is found, timely apply available nitrogen fertilizer such as urea, ammonium bicarbonate or spraying 0.3-0.5% urea solution on human feces and urine or foliar.

Phosphorus deficiency disorder: when eggplant is phosphorus deficient, the stem is slender, the fiber is well developed, the flower bud differentiation is prolonged, the leaf becomes smaller, the color becomes darker, and the leaf vein is red. Prevention and control measures: before planting, apply adequate calcium superphosphate or diammonium phosphate; phosphorus deficiency is found during the growing period, and 0.2% potassium dihydrogen phosphate solution or 0.5% superphosphate leaching solution is sprayed on the leaves.

Potassium deficiency disorder: when eggplant was deficient in potassium, the heart leaf became smaller, grew slowly and the leaf color became lighter in the early stage; in the later stage, the leaf veins lost chlorosis, yellow and white patches appeared, and the leaf tip leaf margin gradually withered. Potassium deficiency in eggplant is rare in production. Prevention and control measures: increase the application of potash fertilizer and organic fertilizer, generally use 10-15 kg potassium sulfate or potassium chloride per mu, trench on both sides, and also spray 0.2-0.3% potassium dihydrogen phosphate solution or 10% plant ash leaching solution on the leaf.

Calcium deficiency disorder: when eggplant is calcium deficient, the growth is slow, the growth point is deformed, the leaf margin of young leaves is green, and the reticular veins of leaves turn brown, showing ferruginous leaves. Prevention and control measures: watering and fertilizing on time, timely supplement of calcium fertilizer when calcium deficiency is found, or foliar spraying of all-water-soluble Merrill Lynch high-efficiency calcium.

Magnesium deficiency disorder: when eggplant is magnesium deficient, it turns yellow near the leaf vein, especially around the main leaf vein, the leaf becomes green, the fruit becomes smaller, and the development is poor. Magnesium deficiency in eggplant is more common in production. Prevention and control measures: increase the application of magnesium fertilizer, such as magnesium sulfate, magnesium chloride, magnesium nitrate, magnesium oxide, potassium magnesium fertilizer, etc., all soluble in water, easy to be absorbed and utilized; can also be foliar spraying 1-3% magnesium sulfate or 1% magnesium nitrate solution.

Iron deficiency disorder: when eggplant is iron deficient, young leaves and new leaves are yellow and white, and leaf veins remain green. It often occurs under the condition that the soil is acidic, fertile and wet. Control measures: 0.5-1% ferrous sulfate solution is sprayed on leaves.

Boron deficiency in eggplant

Boron deficiency disorder: when eggplant is boron deficient, the top leaf yellowed and withered, the apical stem and petiole were broken, the interior became black, and there were cork-like cracks on the stem. Remedial measures: boron deficiency was found and 0.05-0.1% red A boron solution was sprayed on the leaves.

Manganese deficiency disorder: when eggplant is deficient in manganese, the leaf veins are yellow-green and soon turn brown, and the leaf veins are still green. Prevention and control measures: foliar spraying 1% manganese sulfate solution.

Zinc deficiency disorder: when eggplant is zinc deficient, the small leaves are clustered, macula occurs on the new leaves, and gradually develops to the leaf margin, resulting in the yellowing of the whole leaf. Prevention and control measures: 0.1% zinc sulfate solution is sprayed on the leaves.

Molybdenum deficiency disorder: when eggplant is molybdenum deficient, macula occurs between leaf veins from the time of fruit expansion, and the leaf margin curls to the inside. Control measures: foliar spraying 0.01-0.1% ammonium molybdate solution.