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经大量调查研究得到如下结论: 1. 四川小麦白粉病初侵染源有三种情况:一是川西北盆缘完全越夏区, 初侵染源为当地越夏的子囊壳和紧邻高原春麦上的分生孢子及山区自生麦苗上的分生孢子; 二是川南部分越夏区, 小麦白粉病初侵染源,主要来自800m 海拔以上自生麦苗上的分生孢子;三是盆地中部非越夏区,初侵染源完全依赖盆地周缘秋苗上的分生孢子。2. 西北气流、西南气流和西北偏北气流是盆周缘菌源向盆地内扩散的重要途径。3. 四川白粉病流行激增期均在3 月中旬～4 月下旬。
After a large number of investigations and studies, the following conclusions can be drawn: 1. There are three primary sources of wheat powdery mildew in Sichuan Province. First, the basin margin in the northwestern Sichuan is completely over-summer. The primary sources of invader are the local crustacean shell and the spring wheat adjacent to the plateau Conidia and mountain viable wheat seedlings conidia; the second part of the southern part of the more summer, wheat powdery mildew primary source of intrusion, mainly from above 800m above the autotrophic wheat seedlings on the conidia; third basin in the non-summer area The primary source of infection is completely dependent on the conidia on autumn seedlings in the basin. Northwest airstream, southwest airstream and northwest north airstream are the important ways for the periphyton to diffuse into the basin. 3. Sichuan powdery mildew epidemic surge period are in mid-March ~ late April.