Prevention and control of rice diseases and insect pests: how to control rice false smut?

How to prevent and cure false smut of rice? What are the hazards of rice false smut? Please introduce the harm of rice false smut: Rice false smut only occurs in the panicle, generally from flowering to milk stage, infected grains, the pathogen grows in the glume, forming rice koji with a diameter of about 1 cm instead of rice grains. The optimum temperature for germination and development of false smut pathogen was 25 ~ 30 ℃, and the pathogen could not grow above 34 ℃ or below 12 ℃. Rice false smut pathogen can infect the flowers and young glumes of rice. The main stage of pathogen infection was the middle booting stage of rice, but rarely invaded after flowering. From the end of booting stage to the heading stage of rice, if we encounter the climatic conditions of high humidity, suitable temperature and small temperature difference between day and night, it is very conducive to the occurrence and prevalence of the disease. At the same time, there were obvious differences in resistance among varieties, and the occurrence of the disease was positively correlated with unreasonable application of nitrogen fertilizer, and the disease was serious in the fields with light green and low-lying humidity in the middle and later stage of rice. Methods for prevention and control of rice false smut: 1. Agricultural prevention and control methods: selecting disease-resistant varieties, proper sparse planting and seedling throwing cultivation must pay attention to sparse throwing and cultivate strong and effective panicles; reasonable fertilization, control the amount of nitrogen fertilizer, increase phosphorus and potassium fertilizer, apply fertilizer early to promote early development, control the amount of panicle fertilizer, change the traditional fertilization method to balance promotion method, make rice plants yellow naturally in the later stage, and enhance the ability of rice body to resist disease. Rational irrigation, timely and appropriate shelving and drying of fields. 2. Chemical prevention and treatment: the suitable period of application is 15 days after rice heading (before rice hits the bud and prevents panicle blast). Spray 60 grams of Jinggangmycin or Jinggang with 20% per mu. Pyrimidine 15 ml or 16% well. Ketone. Tricyclazole 150-200g water 50ml 60kg spray control. Click to get more rice planting techniques click to get more food crop planting techniques