Journal of Microbiology and Biotechnology

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Biological Control of Strawberry Gray Mold Caused by Botrytis cinerea Using Bacillus licheniformis N1 Formulation

  • Kim, Hyun-Ju (Division of Applied Biology, College of Natural Resources and Life Science, Dong-A University) ;
  • Lee, Soo-Hee (Division of Applied Biology, College of Natural Resources and Life Science, Dong-A University) ;
  • Kim, Choul-Sung (Division of Applied Biology, College of Natural Resources and Life Science, Dong-A University) ;
  • Lim, Eun-Kyung (Division of Applied Biology, College of Natural Resources and Life Science, Dong-A University) ;
  • Choi, Ki-Hyuck (Division of Applied Biology, College of Natural Resources and Life Science, Dong-A University) ;
  • Kong, Hyun-Gi (Division of Applied Biology, College of Natural Resources and Life Science, Dong-A University) ;
  • Kim, Dae-Wook (Division of Applied Biology, College of Natural Resources and Life Science, Dong-A University) ;
  • Lee, Seon-Woo (Division of Applied Biology, College of Natural Resources and Life Science, Dong-A University) ;
  • Moon, Byung-Ju (Division of Applied Biology, College of Natural Resources and Life Science, Dong-A University)
  • Published : 2007.03.31
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Abstract

Bacillus licheniformis N1 is a biological control agent to control gray mold diseases caused by Botrytis cinerea. Various formulations of B. licheniformis N1 were generated and evaluated for the activity to control strawberry gray mold. The wettable powder type formulation N1E was selected in pot experiments with remarkable disease control activity on both strawberry leaves and flowers. The N1E formulation contained 400 g of com starch, 50 ml of olive oil, and 50 g of sucrose per a liter of bacterial fermentation culture. Optimum dilution of N1E to appropriately control the strawberry gray mold appeared to be 100-fold dilution in plastic house artificial infection experiments. The significant reduction of symptom development in the senescent leaves was apparent by the treatment of N1E at 100-fold dilution when N1E was applied before Bo. cinerea inoculation, but not after the inoculation. Both artificial infection experiments in a plastic house and natural infection experiments in the farm plastic house under production conditions revealed that the disease severity of gray mold on strawberry leaves and flowers was significantly reduced by N1E treatment. The disease control value of N1E on strawberry leaves was 81% under production conditions, as compared with the 61.5% conferred by a chemical fungicide, iprodione. This study suggests that our previously generated formulation of B. licheniformis N1 will be effective to control strawberry gray mold by its preventive activity.

Keywords

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