AVALIAÇÃO DO POTENCIAL ANTAGÔNICO DE CEPAS DE Trichoderma sp. NO CONTROLE DE Macrophomina phaseolina

Abstract

The study aimed to evaluate the antagonistic potential of three Trichoderma sp. strains (P3, P10, and P6) in controlling Macrophomina phaseolina, the causal agent of root and stem rot in maize (Zea mays). The experiment was conducted at the Microbiology and Phytopathology Laboratory of the Agricultural Research Institute of the Cerrado (IPAC), in Rio Verde, Goiás, Brazil. The technique used was the dual culture method on PDA medium. The evaluation with isolate P10 showed the highest control capacity, colonizing 100% of the culture medium surface and inhibiting the growth of Macrophomina phaseolina. Isolates P3 and P6 showed promising results, although not equivalent to isolate P10. The results demonstrate the potential of these strains under laboratory conditions, reinforcing the importance of continuing studies in greenhouse and field environments to determine which of the three strains is most effective in controlling Macrophomina phaseolina.