In general,P.graminis was mai nly distributed in winter barley or wheat growing areas around the Middle-lower rea ches of Yangtze River,Yellow River and Huaihe.

• 分布区主要在长江、黄河和淮河中下游流域。禾谷多粘菌的分布范围比大麦黄花叶病等3种病毒病的分布更广泛。