Many people don't know about rice bacterial blight. What is Rice Bacterial Blight?

The main diseases are: the root system of rice is underdeveloped, sometimes black roots or rotten roots appear, the seedlings grow leaves slowly, tillering slowly or even sparsely, the leaves have reddish brown or dark brown spots, and the leaves are unable to droop. Zinc deficiency, potassium deficiency and phosphorus deficiency may all cause this disease. In addition, there are other immature straws in the field, and the gas produced poisons the roots and causes bacterial blight. How to control rice bacterial blight? Because of different topography, different causes, different degrees, different climate, different prevention methods are also different.

Nutritional deficiency: Rice is sensitive to potassium, phosphorus and zinc. If the amount of potassium fertilizer, zinc fertilizer and phosphate fertilizer is not enough, rice will suffer from bacterial blight due to nutrient deficiency. Root damage: After transplanting rice, the watering layer is too deep, which will lead to root hypoxia, and it is easy to produce and accumulate toxic substances such as hydrogen sulfide, organic acids, ferrous iron, carbon dioxide and biogas, especially in rice fields where ammonium sulfate is used for a long time, which will cause rice root poisoning, seriously inhibit root respiratory function and nutrient absorption, and easily lead to rice wilt.

Rice bacterial blight, also known as rust, is commonly known as wilting of cooked seedlings. This is a common physiological disease of rice. The diseased plants mostly start from the lower old leaves, producing reddish-brown rust-like spots of different sizes, which are easy to occur at the tillering stage of rice. In severe cases, only a few new leaves of the whole plant are green and look like fire. It will lead to slow leaf emergence of rice seedlings, obvious dwarfing of plants, few and small tillers, and premature senescence of rice in the later stage, which will seriously affect the normal growth and development of rice.

The main symptom is that the affected rice plants have few tillers and the tillers grow short. Generally, the disease begins from the old leaves, which are yellow, narrow and hard, and the stems are thin and weak. In the early stage, the leaves turn slightly dark green or dark green, and a large number of reddish-brown spots will be produced from the tip to the veins, which will gradually develop into rust-like contiguous lesions; The root system of the diseased plant is poorly developed, the root is reddish brown, and the white root is rarely easily pulled out. In severe cases, it is reddish brown from the tip of the leaf to the bottom of the leaf. Only a few new leaves of plants are green, like fire, and the roots are yellowish brown, short and few.