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In the rice stripe disease recurrence area, rice varieties resistant to disease should be selected as much as possible, such as japonica rice no. 10, Yanjing No. 5, Yanjing No. 6, Yanjing No. 7, Yandao No. 8, Huaidao No. 6, Huai Youyi 2, Xudao 3, Zhendao 88, Zhendao 99, Yangjing 9538, etc., or replanted high-quality japonica rice varieties Liangyoupeijiu and Yuyou 559 with stronger resistance to japonica rice.
Prevention and control of rice stripe disease
For rice varieties with weak or no resistance to large-area stripe disease, the focus of disease prevention is to avoid or reduce the transmission of Laodelphax striatellus. Before and after the wheat harvest, it is the peak period of the generation of the gray locusts from the wheat fields to the rice fields. In the case of production permitting, the planting can be postponed at a suitable time, and light planting measures such as throwing and fat bed breeding are used together, and the sowing period is postponed until about May 15 or even later, and then the seedling transplanting or seedling throwing is adopted. Planting method. This can effectively avoid the peak of a generation of gray planthoppers. In addition, try to choose a field with a small amount of insect source and a clean surrounding environment for the field. If you have the conditions, you can concentrate the Dianchi Lake and avoid the isolation of the farmer in the wheat field. Soaking seeds with chemicals has certain control effect on the early poisonous locusts in the seedbed. For every kilogram of rice seeds, more than 0.8g of imidacloprid (active ingredient) can also be used for soaking seeds. Soaking seeds can also treat other pests such as aphids in the field. In the rice paddy field and in the early stage of transplanting the field, the timely use of the drug during the peak period of the poisoning of the planthopper was carried out to control the planthopper. Ruijinte is the first choice for the control of Laodelphax striatellus. Generally, 5% Regent 30 ml per acre can be used to treat Sanhua and Indica. 10g of imidacloprid 40g per acre or 20g of high-efficiency Dagongchen WP, also has good control effect on Laodelphax striatellus. Production should be organized in a larger area to control the gray planthoppers in order to achieve the best pest control effect.
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