谷子锈病[Uromyces setariae-italicac(Pief)Yoshion]在我国北方谷子产区的初侵染来源尚未搞清。本研究证明,我国北方年最低旬平均气温为—10.1℃以上的谷子产区,谷子锈菌夏孢子失去田间活体寄主后,随罹病谷草在室内及室外;随病残体在土表;随罹病根(?)在5—10cm土壤内可休眠越冬。侵染力保持期在室内、室外干燥场所达11个月以上 The source of primary infection of millet rust [Uromyces setariae-italicac (Pief) Yoshion] in the northern millet producing areas of our country has not yet been clarified. This study shows that in northern China in the lowest average temperature of -10.1 ℃ above the millet producing areas, millet rust spores of millet rust lost host in the field, with diseased cereal indoors and outdoors; with the sick in the soil surface; with disease Roots (?) Can sleep in 5-10cm soil overwinter. Infectivity retention period indoors, outdoor drying place for more than 11 months