Using Rice Variety Diversity to Control Rice Blast Disease Technology

I. Technical Overview Rice blast is a fulminant rice disease that can have a devastating effect on rice yield, making it difficult to control, costly, and poorly performing. The Plant Protection Station of Yunnan Province introduced the technology of controlling rice blast using the diversity of rice varieties researched by Yunnan Agricultural University. After two years of experiments and demonstrations, it has achieved good results. The application of the rice blast disease in the areas frequently affected by rice blast can increase income by 10-15%. The technology is simple and easy to use, can reduce the use of drugs 1-2 times, in line with the requirements of the production of green rice. Second, the operating procedures 1, select the appropriate combination of varieties. According to the local breed resources, consider the differences in genetic background background, disease resistance, agronomic traits and economic traits for selection. Generally selected as the main cultivar with high yield, dwarf and good resistance, high quality rice, fragrant rice, and glutinous rice are used as intercropping varieties for high poles. The height of the main planted dwarf varieties and the height of the intercropping cultivars are required. A difference of more than 30 cm, the growth period is basically the same, generally can not be a difference of 7 days. The combination of varieties should be selected according to the opinions of the local county plant protection station, or consult the provincial plant protection station. 2, cultivation requirements. According to the output requirements per acre, planted 20000 bushes/mu base, appropriate adjustments. The planting method is as follows: â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹ â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹â—‹ â—‹â—‹â—‹â—‹â—‹â—‹â—‹ Note: â—‹The main cultivar is generally dwarf, which is a cultivar. It is generally a high stalk. The height difference between the stalk and the stalk must be 30 cm. The main cultivar can be transplanted. It can be thrown, and the cultivar can not be more than two lines, with one behavior suitable. 3, pest control. Before sowing, rice seeds are germinated or seeded with 25% of Xianan EC 2000-3000 times for 24-48 hours; germination or sowing is performed for 3-5 days before transplanting; the varieties of pesticides can be based on local rice disease. Insect control objects were selected; in the year of occurrence of rice blast, leafhoppers were not treated with pesticides. 30 days before heading, 30-35 grams of triterpene (tricyclazole) or 100 ml of Fuji No. 1 was used to spray 30 kg of water on the neck plague. III. Notes 1. The selection of varieties should be selected according to the opinions of the local plant protection station. The height difference between varieties should be more than 30 cm. 2. The application of this technology does not guarantee that no rice blast disease will occur, but it will greatly reduce the incidence and reduce the damage caused by rice blast. 3. The inbreeding period of the variety is inconsistent and the sowing date can be adjusted so as to ensure that the selected varieties are basically in the same maturity period. 4. Interplanted varieties should not be planted in more than two rows, otherwise the effect of controlling rice blast disease will be affected. 5, other pest control according to the guidance of the local plant protection station. Source: Jiangxi Plant Protection Station Contribution Unit: Jiangxi Agricultural Technology Extension Station

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