Control measures for rice brown blight

The first is to cultivate seedlings of good quality and appropriate age: the main prevention of red wilt is to promote the early emergence of seedlings and the emergence of new roots after transplanting.
The second is to transplant in real time to avoid premature planting: premature planting due to the slow rise of ground temperature, low soil temperature in paddy fields, can not meet the requirements of hair roots, new roots occur slowly, black roots are more than white roots, and red blight is prone to occur. Under normal circumstances, 10 to 15 days after planting, there is no planting time for rice tillers, which can be regarded as a range of premature planting.
The third is shallow water cultivation, shallow water irrigation: shallow water irrigation has higher mud temperature than deep water irrigation, and shallow planting can make the stem base of new new roots in the upper soil with higher mud temperature and sufficient air, which is beneficial to the growth of new roots. . At the same time, it is also conducive to the absorption and utilization of potassium and other nutrients. Therefore, shallow water shallow planting and shallow water irrigation are necessary measures to prevent new roots and prevent blight of rice plants.
Fourth, strengthen the field inspection and diagnosis after planting, timely prevention and control: In addition to the above measures, if the soil is decomposed by the application of unfertilized organic fertilizer to produce toxic substances, or lack of certain elements, etc., it may occur . Then, in order to find out early whether or not the occurrence of red bowel disease, the seedlings can be pulled up 7-10 days after transplanting to check the root condition. If phosphorus deficiency can be used to apply 10-15 kg of superphosphate per acre, it is also possible to spray potassium dihydrogen phosphate outside the root; potassium-deficient rice fields can be used for 2-3 kg of potassium chloride per mu, and zinc-deficient rice fields are used per acre. Zinc sulfate 2 is sprayed with water.