Control of Rice Diseases and insect pests: what is Rice Red Blight?

What is rice red blight? What harm does red blight do to rice? How to control rice red blight? Please introduce the harm of rice red blight: Rice red blight, commonly known as bowing seedlings and setting trees, is a physiological disease in rice production. The diseased plants are obviously short, the tillers are small, the angle between the upper leaves and the stem is small, and the young leaves of the diseased plants are dark green or dark green. Most of the diseased plants start from the lower old leaves and gradually expand upward, but the new leaves often remain green. Entering the peak tillering stage, the symptoms are most obvious, the leaves appear clastic brown spots, and then gradually develop into an irregular shape, the growth of diseased plants is slow, and serious fields look like scorched fields, with a general yield reduction of 10-20% and a serious yield reduction of more than 30%. The cause of rice red blight: the lack of soil phosphorus and potassium caused by long-term excessive application of nitrogen fertilizer is the main cause of rice red blight. The imbalance of plant nutrition is caused by the obstruction of root absorption. The roots of rice plants with bacterial blight are affected by organic acids or hydrogen sulfide in the soil, which destroys the normal physiological function. The control methods of rice red blight are as follows: 1. Improve the ventilation of the soil and sun the field at the right time. Combined with the incidence of the disease, 30-50 kg of "black and white ash" (3 parts of plant ash mixed with 1 part of lime) can be applied per mu, or 2.5-4 kg of gypsum or 5-25 kg of lime. For those deficient in phosphorus and potassium, a certain amount of calcium superphosphate and potassium sulfate can be applied. 2. Apply micro-fertilizer. The effect of applying 1 kg of zinc sulfate per mu as base fertilizer is better, and 1 kg of zinc sulfate can also be used as topdressing. The diseased fields can also be foliar sprayed with 5% zinc sulfate fertilizer solution, which can have an immediate effect, but the effect of increasing production is not obvious. Click to get more rice planting techniques click to get more food crop planting techniques