小麦秆锈病(Puccinia graminis var.tritioi)是我省小麦的主要病害之一。解放初期曾三次大发生(1948、1951、1952年),秆锈病大发生年甚至造成颗粒不收。我所于1970～1978年研究分析了我省小麦秆锈菌生理小种的类群和消长动态,为抗源鉴定、选育抗锈品种及新品种合理布局提供理论依据。一、材料和方法 1.秆锈菌标样来源:在1970～1978年, Puccinia graminis var. Tritioi is one of the main diseases of wheat in our province. In the early days of liberation, three major occurrences occurred (1948, 1951, 1952), and the incidence of stem rust was even large. From 1970 to 1978, I studied and analyzed the population dynamics and the growth dynamics of the races of wheat stalk rust in our province and provided the theoretical basis for the identification of anti-rust varieties and the rational layout of new varieties. First, materials and methods 1. Stem rust standard source: From 1970 to 1978,