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- Title
Biological characterization of Fusarium buharicum-induced wilt of okra and its management.
- Authors
Paul, Swapan Kumar; Gupta, Dipali Rani; Ino, Masatoshi; Hirooka, Yuuri; Ueno, Makoto
- Abstract
Fusarium wilt is a destructive fungal disease of okra that limits okra production in the okra-growing region. In 2015, a new pathogen was identified in an okra field that caused wilt disease in okra. However, no detailed morphological, molecular, or physiological studies have been conducted to characterize this pathogen. The causal agent was identified as Fusarium buharicum by morphological characterization and elongation factor-1α gene sequencing. Moreover, to determine pathogen characteristics that may be useful for future disease management, the effects of different media, temperature, and pH on mycelium growth, conidia production, and germination were studied. Potato sucrose agar and potato dextrose agar were the best media for mycelial growth, whereas rice husk media were suitable for conidial production. The optimal temperature for mycelial growth and conidial germination was 28 °C. Meanwhile, pH ranging from 5 to 9 was suitable for both mycelial growth and conidial germination. The host range assay revealed that F. buharicum infected only okra, but not the other crops tested. Furthermore, in planta biofungicides screening showed that Ecohop (Trichoderma atroviride) reduced wilt disease incidence by 93.8% over control. Characterization of the pathogen along with biofungicide screening would be helpful for the detection and development of management practices to eliminate production loss in the okra field caused by an emerging fungal pathogen.
- Subjects
FUSARIUM; PRODUCTION losses; OKRA; RICE hulls; MYCOSES; BIOFUNGICIDES; WILT diseases
- Publication
Journal of Plant Pathology, 2024, Vol 106, Issue 2, p527
- ISSN
1125-4653
- Publication type
Article
- DOI
10.1007/s42161-023-01557-0