Reasons and Methods of Eggplant Fertilizer Damage

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During the process of eggplant cultivation, many friends will encounter the situation that there are lot of necrotic spots between the veins of eggplant and the spots dry green, yellow, gray, brown and other colors which seriously affect the normal growth of eggplant. In fact, this is the fertilizer damage symptoms of eggplant as well as the specific reasons for fertilizer damage are the following:

(1) Improper foliage spraying. People’s understanding of foliar fertilizer is not enough, they always think that more foliar fertilizer is more beneficial to crops. Some manufacturers add hormone substance in the foliar fertilizer to stimulate crop growth. However, excessive application of hormone fertilizer will lead to fertilizer damage like leaf stiffness, brittle, distorted deformity, thicker stems, inhibit growth, resulting in micro-fertilizer poisoning.

(2) Improper top dressing. When the eggplant is full and the day with high temperature, apply top dressing fertilizer (ammonium bicarbonate fertilizer). If you do not pay attention to the shed temperature, it will cause ammonia poisoning, leaves or leaf edge will appear water-like markings, and then the markings will turn to brown, dry edge leaf will have the burning symptoms. If apply excessive fertilization one time, there will cause a large area anthrax disease leaves or dry leaf phenomenon.

(3) Non-decomposed organic fertilizer. The non-decomposed organic fertilizer (such as chicken manure) mixed with the nutrient soil or applied in the soil surface will lead to seedlings burning, the seedling roots are brown and has no new roots, which will affect the root absorption of fertilizer and the local leaves or the whole plant growth and development. In addition, due to acid-base hot soil is uneven, there will be the symptom of root burning and absorption difficulties which lead to eggplant veins radially yellow.

Eggplant fertilizer disease prevention and control methods:

(1) Full maturity of organic fertilizer. Before the application of organic fertilizer, the organic fertilizer should be fully decomposed. The accumulated organic fertilizer should be decomposed by micro-organisms and broken down into nutrients and humus substances, such organic fertilizer is suitable for application.

If there is fertilizer damage phenomenon, you should add water immediately to ease, usually after 7 to 10 days, the plant can grow normally. But you still need to pay much attention that the eggplant is not waterlogging, can not add excessive water to avoid fertilizer damage.

(2) scientific application of top dressing fertilizer. In summer or high temperature season, top dressing fertilizer should be applied in ditch, and then covered by soil. In addition, the fertilizer application need to avoid the noon time as well as apply fertilizer on evening and ventilation should be timely. Some greenhouse can use drip irrigation and fertilizer technology, which can effectively avoid high temperature burning leaves, uneven fertilizer and water conditions so that reducing the fertilizer damage.

(3) Strictly control the foliar fertilizer spraying. When you spraying foliar fertilizer, you should accurately control the dose, so that have reasonable and formula fertilization.

The article is quoted from: https://www.fert.cn/news/2017/10/09/102136451750.shtml

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