由灰葡萄孢Botrytis cinerea引起的梨灰霉病是梨果储藏中危害严重的病害,不仅影响果实品质,还可造成严重经济损失(Romanazzi et al.,2016)。生物防治作为环保、安全的方法日益受到重视。链霉菌因其种类繁多、代谢产物丰富、作用方式多样等优点,已成为重要的生物防治微生物资源,但其在梨灰霉病生物防治中的研究应用较少(孙平平等,2016)。因此,本研究以灰葡萄孢为供试病原菌,筛 Botrytis cinerea caused by Botrytis cinerea pear cv. Pear disease is a serious damage in the storage of pear, not only affect the quality of the fruit, but also cause serious economic losses (Romanazzi et al., 2016). Biological control is paid more and more attention as an environmentally friendly and safe method. Streptomyces has become an important biocontrol microbial resource due to its wide variety, rich metabolites and diverse modes of action. However, its application in the biological control of pear gray mold is rare (Sun et al., 2016). Therefore, in this study, Botrytis cinerea as a test pathogen, sieve