Hot (sweet) pepper and salt disorders

The main symptoms are that salt disturbance is easy to occur in saline-alkali areas or protected areas after many years of cultivation, which leads to poor growth and reduced yield of hot pepper. Yellow to brown round or oval necrotic spots appear on the leaves.

The cause of the disease is that the soil salt concentration is too high, which makes the water and nutrients in the roots permeate outward, and the aboveground growth stops growing because there is no water and nutrients; too much fertilizer is applied, which is difficult to leach, and organic fertilizers containing much livestock and poultry manure are applied. The use of ammonium chloride, potassium chloride and so on will lead to the increase of soil concentration. The temperature in the protected field is high, the soil water evaporation is large, the salt in fertilizer is easy to rise by capillary water, and accumulate in the surface soil layer, coupled with the shallow root system of vegetables in the protected field, salt disturbance is more likely to occur.

Control methods (1) properly reduce the amount of chemical fertilizer and apply appropriate amount of mature organic fertilizer. (2) choose fertilizers that are not easy to increase salt concentration, and avoid using chemical fertilizers containing side effects, such as ammonium sulfate, etc.