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１９９１年前，山东省小麦白粉菌优势小种为１５号，以后呈波浪形下降；１９９４年１４号小种上升为优势小种，出现频率为７７．８％，其次是１５号和１６号小种。山东省小麦白粉菌群体毒性基因，以Ｖ１、Ｖ５、Ｖ６、Ｖ７的毒力频率最高（１００％）。而Ｖ２、Ｖ４ｂ、Ｖ２＋Ｖ６表现无毒力，Ｖ５＋Ｖ６、Ｖ４ｂ＋Ｍｌｉ（５）、Ｖ１７毒力频率较低（５．１～２５．９％），与其相对应的抗性基因Ｐｍ２、Ｐｍ４ｂ、ｐｍ２＋ｐｍ６、ｐｍ５＋ｐｍ６、ｐｍ４ｂ＋Ｍｌｉ（５）等是有效抗病基因。山东省小麦白粉菌含有９个以上毒性基因的菌株，出现频率为９６．３％，毒性基因谱广。
Before 1991, the dominant race of wheat powdery mildew in Shandong Province was No.15, and then declined in a wavy pattern. In 1994, the races of No.14 rose to the dominant race, with a frequency of 77.8%, followed by No.15 and No.16 Species. Shandong province wheat powdery mildew group virulence genes to V1, V5, V6, V7 virulence frequency (100%). While V5 + V6, V4b + Mli (5) and V17 had lower virulence frequencies (5.1-25.9%), while the corresponding resistance genes Pm2, Pm4b, pm2 + pm6, pm5 + pm6, pm4b + Mli (5) is an effective resistance gene. Shandong Province powdery mildew bacteria containing more than 9 strains of toxic genes, the frequency of 96.3%, broad spectrum of toxic genes.