Occurrence and Development Dynamics of Wheat Stripe Rust in Shandong Province

Occurrence and development dynamics of wheat stripe rust in Shandong Province in recent years was analyzed, level of resistance to stripe rust of some main wheat cultivars in Shandong Province was analyzed, and source and route of transmission of wheat stripe rust in spring were discussed, prevention and control suggestions were proposed．Results showed that, except 2020, some counties and cities occurred earlier in some years．Resistance level of wheat varieties to stripe rust was increased in Shandong wheat region．Among 29 main cultivars, 12（42.9%）had moderate or higher resistance to stripe rust．There are currently two inferences about transmission sources and paths of spring epidemics．Firstly, bacterial sources in Longnan and Sichuan Basin spread through central part of Shaanxi Province to the Central Plains wheat region．Secondly, stripe rust fungus in wheat region of Shandong Province may come from winter breeding area in northwest Hubei．Two suggestions were proposed．One was to strengthen basic research on wheat stripe rust, such as dominant physiological races, population genetic structure, and transmission pathways of stripe rust in wheat region of Shandong Province．The second was to establish a long-term mechanism for monitoring wheat stripe rust in Shandong Province, such as regular monitoring of physiological races and continuous monitoring of rust resistance of varieties．