Beneficial microorganisms antagonistic to Curvularia petersonii, which causes foliar lesions in sugar cane
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Abstract
Foliar necrosis in sugarcane caused by phytopathogenic fungi is a serious problem; as a biocontrol alternative, beneficial microorganisms could offer a sustainable solution. The objective of this study was to evaluate the antagonistic effect of beneficial microorganisms against Curvularia petersonii, a phytopathogenic fungus responsible for foliar necrosis in sugar cane cultivation. A sequenced strain with 99.60% identity for C. petersonii (Accession No. NR_158448.1) to evaluate the percentage of inhibition (Trichoderma harzianum, Trichoderma asperellum, Bacillus subtilis, and Pseudomonas fluorescens) with 5 replicates and their respective controls over 16 days of evaluation. The mathematical modeling technique of exponential growth was used to model the development of C. petersonii under in vitro conditions and in the presence of antagonistic microorganisms using the Lotka-Volterra for dual crop confrontation. The results support that the beneficial microorganisms used had an antagonistic inhibitory effect on the phytopathogenic fungus C. petersonii, concluding that these microorganisms have advantages as biocontrol agents against C. petersonii.
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