苹果白粉病菌以菌丝体的形式在芽和花芽里越冬。白粉病菌,即专性寄生菌仅在活着的寄主组织里才能幸存。严冬之后,白粉病发病率很低。过去的研究指出,低温不能直接影响菌丝体,但病芽似乎比健壮芽更易受低温的危害。本研究旨在定量地确定供试苹果品种健壮芽和病芽存活的最低温度。 Powdery mildew of apple in the form of mycelium wintering in buds and flower buds. Powdery mildew, obligate parasites, survive only in living host tissues. After winter, the incidence of powdery mildew is very low. Past research indicates that hypothermia does not directly affect mycelia, but the diseased buds appear to be more susceptible to hypothermia than robust buds. The purpose of this study was to quantitatively determine the minimum temperature at which robust and buds of tested apple varieties survived.