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一、研究转主寄主的意义禾谷类锈菌在转主寄主上进行有性生殖和发生致病性变异,是涉及禾谷类作物锈病发生的初侵染来源和作物抗病性表现发生变异的重大问题.因此,锈菌在自然界是否存在转主寄主以及转主寄主的作用等是应该首先澄清的.美国为消灭小麦秆锈菌的转主寄主曾花了很大的人力、财力和物力,对防治小麦秆锈病起了相当大的作用.我国东北中部地区也有大叶小柏存在,它们与小麦秆锈病的发生有无关系?经研究,在室内条件下经人工接种证明,大叶小柏是小麦秆锈菌的转主,但在自然条件下它们对秆锈病的发生不起作用,因此不需要铲除它们,这就为国家节约了大量的人力和财力.
First, the study of the significance of the main host Gramineae rust on the main host sexual reproduction and pathogenic mutation occurs, is involved in cereal rust origin of primary infection and crop disease resistance significant variation Problem.Therefore, rust in the existence of the main host and turn the main role of the host should be the first to clarify the United States to eliminate the main host of wheat stem rust had spent a lot of manpower, financial and material resources, Prevention and treatment of wheat stem rust played a considerable role in the central region of Northeast China there are also the existence of the small cypress, their occurrence and wheat rust have no relationship? The study, under indoor conditions proved by artificial inoculation, cypress is the wheat straw Rust translocation, but under natural conditions they have no effect on the occurrence of stem rust, so they do not need to be eradicated, which saves a lot of manpower and financial resources for the country.