The prevention and control of wheat seedling pests and diseases can effectively reduce the number of pests and diseases and delay the occurrence of pests and diseases. The Crop Management Division of the Ministry of Agriculture and the National Agricultural Technology Extension Service Center organized relevant experts to review the climate change trends in autumn this year, summarizing the experiences of wheat seedling pest control in recent years, and formulating guidelines for the prevention and control of disease and pests of wheat in autumn this year. Regional focus Each of the wheat producing areas should determine the pests and diseases to be controlled according to the characteristics of the pests and diseases occurring in recent years. Huanghuaihai wheat area is dominated by sheath blight, root rot, total erosion, smut, cyst nematode disease, yellow mosaic virus disease, underground pests and weeds, and treats seedling rust, powdery mildew, aphids, and ash. Planthoppers and other pests; Rhizoctonia solani, smut and aphid, mainly in the mid-lower reaches of the Yangtze River; both the sedges, powdery mildew, and underground pests; wheat stripe rust in the southwestern wheat area; both powdery mildew and wheat Prevention and control of alfalfa, wheat spiders, and underground pests; wheat stripe rust, powdery mildew, smut, and underground pests are the main control objects in the Northwest Wheat Region, and wheat field crop blight and other prevention and control are required in the wheat region of Xinjiang. Prevention and control technology (a) Select anti-(resistant) varieties. The southwestern wheat area can be selected from Mianza Mai168, Mianmai37, Mianmai39, Mianmai41, Mianmai43, Mianmai45, Chuanmai42, Chuanong18, Xikemai2, and Emai18. Disease-resistant varieties such as Yunmai 2, Wanmai 15, Zhoumai 17, and Buckwheat 53; optional wheat varieties in the southern Huanghuai wheat fields Zhoumai 17, Yumai 34, Yumai 49, Yumai 69, Xinmai 19, West Nong 979, Xiaoyan No.6 and other rust-resistant slow rust varieties; Northwest wheat can be selected Xi Nong 889, Xi Nong 558, Xi Nong 529, Qu Mai 9710, Xi Nong 668, Shan Xi No. 6, Tian Xuan 54, Day Selection 57, Tianxue 58, Zhongliang 32, Zhongliang 34, Zhongliang 35, Ningchun 4, Ningchun 15, Ningchun 16, Yinnong 18, Yinon 61, Xinmai 2 etc. (Resistance) Rust variety. The rust in the southwest, Huanghuai and the northwest, and the areas inhabiting the area throughout the winter and summer are the best choice for high quality and disease resistance. In areas with frequent head scabs such as the middle and lower reaches of the Yangtze River, the Yangtze River and Huaihe Rivers and the southern Huanghuai Plain, high-yield and high-quality varieties with a certain degree of resistance (resistant) to local planting should be selected so as to avoid the introduction of high-yield, disease-affected species across regions. The recurrence area of ​​cyst nematode in Huanghuai, the optional species of Space No.6, Zhongyu No.6 and Xinmai 11; the occurrence area of ​​yellow mosaic disease in wheat, optional variety Xinmai 208, Yumai 70-36, and pan-mai 5 No., Yumai 70, Zhengmai 366 and other varieties. (b) Strengthen agricultural control measures. We will implement fine soil preparation, proper planting in appropriate period, suitable afforestation, and timely agro-ecological measures such as repression and timely irrigation. We will strive to broadcast all seedlings and strong seedlings to enhance plant resistance to pests and diseases. In the middle and lower reaches of the Yangtze River, Yangtze River and Huaihe River, southern Huanghuai, and other areas of frequent head blight, the straw smashing and deep turning to the field are implemented to avoid the bare corn and rice crops exposed on the surface of the soil, so as to reduce the base number of the bacteria and reduce the heading and control of flowering. Pressure; Northwest stripe rust over the summer area, before sowing or before sowing, should be artificially eradicated or spraying herbicides, etc., remove the self-producing wheat seedlings and weeds, reducing the risk of autumn seedling invasive; southwest, Huanghuai South, etc. In the wintering areas of stripe rust, appropriate late sowing should be promoted to shorten the infection time of autumn bacteria as much as possible and reduce the initial infestation bacteria source; in the recurrence areas of JAC, such as JAC, Huanghuai, etc., early sowing should be avoided, and the sowing amount should be appropriately reduced to promptly eliminate Field weeds, drainage in time after rain. In the area of ​​recurrence of cyst nematode in Huanghuai, two repressive measures should be promoted after sowing and in autumn. (C) vigorously promote the autumn seed dressing. Retransmission of soil-borne diseases, using tebuconazole, difenoconazole, fludioxonil, fenoxacin, etc., coating or seed dressing, control of root rot, sheath blight, total erosion, etc. Smut and so on. In the re-emergence area of ​​soil pests, phoxim, chlorpyrifos, or imidacloprid seed coating agents are used to control and control underground pests such as golden worms, cockroaches and cockroaches, as well as cyst nematodes, seedling aphids, and wheat spiders. In summer and winter areas, stripe rust is treated with triadimefon, tebuconazole, etc., or with seed dressing to prevent seed rust, powdery mildew, and late smut. In the area of ​​full-bleeding disease, difenoconazole-coated seed coating agents and thifluzamide (full-etching net) suspension agents were applied. 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Wheat autumn plant disease prevention and yield increase in the coming year