Control Effect and Mechanism of TM11 against Blueberry Root Rot.

is the primary pathogen of blueberry root rot; furthermore, we found that can also cause root rot in blueberries. spp. is widely used to control plant diseases. We isolated (TM11) from blueberry rhizosphere soil to explore its control effect and mechanism on and . We found that the inhibitory effects of TM11 volatiles and broth metabolites on were significant, but only volatile metabolites had a significant inhibitory effect on its growth. Twelve known antimicrobial metabolites were detected from the methanol extract of TM11 fermentation broth by HPLC-MS. TM11 lysed and coiled around the hyphae of and . The pot experiment showed that TM11 had significant control effects against and , and inoculation of TM11 prior to that of and was more effective. The TM11, TM11 and , or and distilled water treatments had different effects on the activities of superoxide dismutase, peroxidase and catalase, and the enzyme activity levels exhibited the following order: TM11 > TM11 and or > distilled water. The results showed that TM11 provided effective control of blueberry root rot.