Biocontrol efficiency of native <i>Bacillus</i> sp. HC-9 on honeysuckle leaf spot caused by <i>Alternaria alternata</i>.

ABSTRACT: Honeysuckle leaf spot disease, caused by Alternaria alternata, severely affects the yield and quality of honeysuckle crops. Biological control using native antagonist microorganisms offers a promising alternative to chemical fungicides. In this study, strain HC-9, previously isolated from honeysuckle leaves, was molecularly identified as Bacillus sp. This strain exhibited broad-spectrum antifungal activity, effectively inhibiting eight phytopathogenic fungi, including A. alternata, with an in vitro inhibition rate of 70.91 %. The cell-free supernatant of HC-9 fermentation broth demonstrated strong antifungal activity (72.79 % inhibition after 48 h of fermentation), which was concentration-dependent and stable under high temperature (100°C), UV exposure (1

SUBMITTER: Luo X 

PROVIDER: S-EPMC12819056 | biostudies-literature | 2026

REPOSITORIES: biostudies-literature