In vitro selection of biocontrol agents for the control of Fusarium sp.

Abstract

The objective of this research was to evaluate the in vitro antagonistic action of Bacillus and Trichoderma sp. in the control of Fusarium sp. responsible for damages in plants of Vigna unguiculata (L.) Walp (cowpea). The assay was conducted using the crop pairing technique. The pathogen Fusarium sp. was obtained by the isolation of cowpea plants with symptoms of the disease. The antagonists used were: Bacillus subtilis (LCB 30), B. subtilis (LCB 45), Bacillus sp. (BMH), Bacillus sp. (INV) and Trichoderma sp. Mycelial growth evaluations were performed when the entire surface of the PDA (Potato Dextrose Agar) culture medium was colonized by Fusarium sp. in the control treatment (pathogen cultured in the absence of the antagonist). For the analyzes, a completely randomized design with 5 replications was used. From the results obtained, it can be inferred that the isolates of Bacillus spp. and Trichoderma sp. have the potential as antagonists against Fusarium sp., the isolate Bacillus subtilis (LCB 45) responsible for inhibiting 25% of the mycelial growth, and the treatments with B. subtilis (LCB 30), Bacillus sp. (BMH), Bacillus sp. (INV) and Trichoderma sp., Inhibited 59.4%, 46.5%, 46.4% and 37% growth of the colony diameter of the causal agent of fusariosis in cowpea plants, respectively.

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References

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Published
2019-01-02
How to Cite
FERREIRA DE SÁ, Mylenna Nádja et al. In vitro selection of biocontrol agents for the control of Fusarium sp.. Acta Brasiliensis, [S.l.], v. 3, n. 1, p. 14-16, jan. 2019. ISSN 2526-4338. Available at: <http://revistas.ufcg.edu.br/actabra/index.php/actabra/article/view/157>. Date accessed: 07 oct. 2024. doi: https://doi.org/10.22571/2526-4338157.
Section
Microbiology

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