Managing Fusarium oxysporum f. sp. vasinfectum Race 4 with beneficial microorganisms including entomopathogenic fungi

S.K. Dara, S.S. Dara, S.S.R. Dara
Fusarium spp. are dangerous pathogens of several commercially important crops around the world. Among non-chemical alternatives, beneficial microorganisms offer a potential control option for Fusarium and other soilborne pathogens. A greenhouse study was conducted using cotton as a model plant and F. oxysporum f. sp. vasinfectum Race 4 (FOV Race 4) as the pathogen to evaluate the efficacy of commercial formulations of microbial and botanical biopesticides. Streptomyces lydicus (Actinovate® AG), Bacillus amyloliquefaciens (Stargus®), giant knotweed extract (Regalia®), entomopathogenic fungi - Beauveria bassiana (BotaniGard® ES), Isaria fumosorosea (PFR-97™ 20% WDG), and Metarhizium brunneum (M. anisopliae; Met52® EC) were applied to FOV Race 4 infested soil in three treatment regimens, and the growth of susceptible Pima cotton seedling growth and health was monitored for 5 weeks. Treatments were generally effective against antagonizing FOV Race 4 especially when applied multiple times at a lower rate or once at a higher rate. Entomopathogenic fungi were as effective as other products that are exclusively used for disease management. Beauveria bassiana provided superior control for a long period compared to other treatments. This study reports the efficacy of non-chemical alternatives against FOV Race 4 and the potential of using entomopathogenic fungi for disease management in addition to their normal role of arthropod pest management.
Dara, S.K., Dara, S.S. and Dara, S.S.R. (2020). Managing Fusarium oxysporum f. sp. vasinfectum Race 4 with beneficial microorganisms including entomopathogenic fungi. Acta Hortic. 1270, 111-116
DOI: 10.17660/ActaHortic.2020.1270.11
https://doi.org/10.17660/ActaHortic.2020.1270.11
Fusarium oxysporum, Beauveria bassiana, Isaria fumosorosea, Metarhizium brunneum, microbial control
English

Acta Horticulturae