Efficacy of four indigenous Penicillium fungal isolates and Aspergillus fumigatus on Fusarium oxysporum f.sp. radicis lycopersici (FORL)

Author:

Ramachela Khosi1,Ramatsitsi Mukondeleli Ndivhuwo1,Segone Galaletsang Petronella1

Affiliation:

1. North West University

Abstract

Abstract In search for indigenous soil borne fungi with bio-control properties against plant pathogenic F. oxysporum f.sp. radicis-lycopersici (FORL) resulted in the isolation of five fungal species. These were identified as: Penicillium commune-1 (MK660351.1), P. commune-2 (MK660335.1), Aspergillus fumigatus (MN178806.1), P. concavorugulosum-1 (MK841454.1) and P. concavorugulosum-2 (MK841454.1). An in vitro dual culture plate experiment was carried out to assess radial growth inhibition and growth competitiveness of potential antagonism on FORL. Analysis of the fungal bio-agents’ interactions with FORL showed occurrence of various relationships such as antibiosis, competition and mycoparasitism. High inhibition effect of P. concavorugulosum-2 (67.9%) and A. fumigatus (65.36%) against FORL was established. The other test isolates’ inhibition was not significant as they ranged from 9–29%. A conclusion can be drawn that P. concavorugulosum-2 and A. fumigatus contain potential bio-antagonistic properties that suppressed of growth of FORL. These fungal isolates should be considered as good candidates for development as commercial bio-control agents as individuals or in combination. However, these species’ suppressive properties should be evaluated under natural soil conditions where various biotic and abiotic factors could influence the efficacy.

Publisher

Research Square Platform LLC

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