The premature aging of rice is characterized by stems and leaves wilting and premature aging after heading to maturity, resulting in poor grain filling and an increase in glutinous rice and reduced yield. The masses are called "stand culms dead" or "back stalks." According to a survey conducted in Changtu County from 1995 to 1998, the incidence of premature morbidity accounted for 20%-35% of the total area, and the production was reduced by 15%-30%, causing serious economic losses to rice farmers. 1. Use resistant varieties. Elimination of susceptible varieties, selection of disease-resistant varieties and comparison of disease-resistant varieties in accordance with local conditions. 2. Eliminates the initial infestation source. When ploughing and soil preparation, combined with the control of sheath blight, remove scum and eliminate sclerotia in winter. And do a good job of seed disinfection, with 2% -3% lime water or 50% carbendazim 500 times or 500 times strong liquid chlorine soaking seeds for 12 hours. 3. Reasonable top dressing, scientific management of water. In the fertilization should be enough base fertilizer, early application of top dressing, suitable for applying fertilizer, nitrogen, phosphorus, potassium with a reasonable mix, enhance the disease resistance of rice plants, should not be late, partial nitrogen fertilizer. It is advised to dry, wet and wet irrigation in the water slurry management. Timely and moderately growing fields enhance the root activity of rice plants, reduce the humidity in the field, and increase the disease resistance of rice. 4. Timely spraying control. In areas where old wards or hybrid rice plants are concentrated, or when rice meets rain and humidity in heading and flowering, it should be sprayed and prevented at the end of the second to third days from the end of booting to the cracking period. Generally, more than 50% of the bacteria are used per head. Ling wettable powder 100g Spray 70kg water. Or about 6d before the first ear with 50% thiophanate-methyl WP 1000 times spray control. China Agricultural Network Editor
Huayi Foodstuff Co., Ltd. , http://www.ln-foods.com