In vivo ANTAGONISM OF Fusarium oxysporum f. sp. Phaseoli, AND GROWTH PROMOTION IN COMMON BEAN ......

The goal of this study was to determine the pathogenic potential of Fusarium oxysporum, as well as the antagonistic potential and growth promotion of Trichoderma spp. strains in vivo in common beans. The experiment was place in two stages. The pathogenicity of the F. oxysporum strain was first tested in 200 mL pots, and then the biometry of the bean plants was assessed. In the second experiment, 5L pots with sterile soil were used. Four Trichoderma strains and one F. oxysporum strain were used. The bean seeds were sterilised before being inoculated with the pathogen, which had previously been cultured in Petri dishes with Mannitol, and then planted. The antagonists were cultivated in petri dishes for five days, then scraped to obtain a spore suspension (10-4 spores per ml), which was then inoculated directly into the soil after the seeds were planted. A completely randomised design with three replications was used in all of the trials. Their agronomic and biometric characteristics, such as the number of leaves, plant height, basal diameter, root length, root weight, and leaf area, were assessed after 57 days. The results were collated and subjected to analysis of variance (ANOVA), with the Skott-Knott test (P =.05) used to compare the means. Plants treated with Trichoderma inoculum produce the greatest results in terms of biometric metrics, suggesting that they can operate as plant growth promoters. Biomass and dry mass are the two most important metrics for this crop. Trichoderma strains utilised in this study were found to reduce F. oxysporum damage while still promoting bean growth.

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