There are many reasons for the redness of corn leaves, low temperature and cold damage, pests and diseases, lack of phosphorus and potassium, may lead to red or even purple corn leaves. But from the farmers reflect the situation, the recent red corn leaves, mainly caused by potassium deficiency, followed by a serious occurrence of corn small spot disease.

Corn if the amount of potash fertilizer is less, frequent rainfall, resulting in a large loss of fast-acting potassium in the soil. In addition, the soil water content is too high, the corn root system is impregnated with absorption is blocked, but also make the corn easy to physiological potassium deficiency, showing slow growth and development, stalks weak and short, the base of the old leaves brown, red, necrosis and other symptoms.

Corn potassium deficiency also makes the plant resistance to disease significantly reduced, coupled with high temperature, high humidity, corn small spot disease occurs heavier, also make the corn leaves show reddish symptoms.

Expanded information:

Solution

One, grab the sunshine from the root of the potash, potassium chloride, potassium sulphate, with the foliar spraying of potassium dihydrogen phosphate, or sprinkled with grass ash

Second, clean up, beat off the basic old leaves, diseased leaves, dead leaves, improve field ventilation and light;

Third, spraying fungicides such as carbendazim, powder rusting, chlorothalonil and other fungicides, good control of corn diseases.