Rice blast can infect the leaves, stems, ears, grains and other parts and cause seedlings, leafhoppers, knots, panicles and grains. In the past two years in our city, the occurrence of the most serious occurrence of leafhoppers and panicle-headed hoppers has been the most serious. Severe year of disease can lead to total production, which is the key disease prevention and control in all rice areas. The cause of the disease: One is related to the source of bacteria. The second is to determine the amount of rainfall after July of that year. If it is cloudy and rainy, it must be taken to prevent the disease. Otherwise, once the disease occurs, the effect of using the best medicine is certain. This is the fundamental principle that should be grasped to prevent and treat this disease. Control methods: 2-3 local disease-resistant varieties are suitable for local conditions; the disease straw is treated and the sterilization source is eliminated; according to the law of rice requirement fertilizer, the formula fertilization technique is adopted; the wet and dry alternation at the later stage is promoted to promote the aging of rice leaves and enhance the disease resistance; Treatment: Doing soaking and selecting drugs correctly, completely soaking and disinfecting can kill the seeds on the carrier. Chemical control: The principle is "focus on prevention, early seizure of leafhoppers, and cure of sputum". The main steps are as follows: The first step of early prevention began on July 1. During the jointing stage of rice, observe the weather. If the weather is overcast or rainy for more than two consecutive days, it should be started immediately after such weather to prevent rice leaf blast. Preventive medication: tricyclazole, prochloraz or its compounding agent. Depending on weather conditions Contiunous 2-3 times, once every 5-7 days, can occur under control of rice blast, follow the instructions of the specific amount of plant protection personnel or used strictly according to the instructions. The second step, the timely use of drugs in the early stages of disease, timely medication to control the disease, to prevent the spread of bacteria spread throughout the field caused by the epidemic. The agents used were: Indolegar, Fuji No.1, and Dinocarb (tebuconazole). Note that the amount of medication must be sufficient and the spray should be comprehensive, not leaking. The third step is to look at the field application. If the occurrence of leafhoppers and panicle blasts is already very serious, there are more than 30% effective ear damage per hole. This situation can be based on the rice growing period to take two solutions: First, the ear of rice Before the ripening period, 20% of the leaves remain green. At this time, it is necessary to continue spraying to control the spread of the disease, and must first be sterilized with strong oxidants, and then use the enemy or Fuji No. 1 for later protection. Second, the rice has reached full maturity, grain leather yellow rice grains dry and hard, this situation would not have to take preventive measures, because if not it will not re-infection prevention and control and expansion.