Volatiles from Bacillus siamensis H30-3 Reduce Grey Mould in Pepper Plants

• Published in: Sigmulbyeong yeon'gu Vol. 31; no. 2; pp. 169 - 174
• Main Authors: Park, Seongmin, Nam, Yoon Kyeong, Kim, Sumin, Um, Juyeoung, Kim, Hyeon Su, Sang, Mee Kyung, Hong, Jeum Kyu
• Format: Journal Article
• Language: English
• Published: 한국식물병리학회 01.06.2025
• Subjects: 농학
• ISSN: 2233-9191; 1598-2262; 2233-9191
• DOI: 10.5423/RPD.2025.31.2.169

Rhizobacteria Bacillus siamensis H30-3 exhibited in vitro antifungal activity against Botrytis cinerea, causing grey mould in pepper plants. Mycelial growth of B. cinerea was restricted under co-cultivation with B. siamensis H30-3 and exposure to volatiles from B. siamensis H30-3. Conidial germination of B. cinerea was also delayed by volatiles produced by B. siamensis H30-3. The volatiles-mediated limitation in the mycelial growth and conidial germination was more evident by B. siamensis H30-3 grown on media containing 0.6% agar concentration than 1.5%. Grey mould lesion on the detached pepper leaves was reduced by volatiles from B. siamensis H30-3, and a higher disease protection efficacy was found by B. siamensis H30-3 grown on media containing 0.6% agar concentration than 1.5%. B. siamensis H30-3 volatiles were enough to decrease grey mould in pepper seedlings. These results suggest that B. siamensis H30-3 can be applied as a biological control agent for the pepper grey mould.