Efeito de metarhizium anisopliae sobre fusarium spp. em cana-de-açúcar.

Abstract

Among the diseases that limit the quality of production of sugarcane, it highlights the red rot. Currently the control is made from fungicide applications, however, there are no products registered for this disease. The use of antagonistic microorganisms constitutes an alternative control method because it does not cause contaminations in the environment nor for the applicator. The objective of this study was to evaluate the “in vitro” effect of Metarhizium anisopliae on Fusarium spp. Indirect isolation of the stem blight of the variety RB92579 with perforation and rot symptoms was carried out. “In vitro” inhibition experiment between M. anisopliae and Fusarium was conducted in 90 x 15 mm Petri dishes in a potato-dextrose-agar (BDA) culture medium supplemented with antibiotic, where a 0.5 cm of diameter containing mycelium of the antagonist and kept in a heated room type BOD at 26 ° C, after five days the plates were inoculated with the fungus Fusarium spp. The design used consisted of three treatments and six replicates. The evaluations were performed at 5, 7, 9 and 11 days. There was a significant 52.2% reduction in the growth of Fusarium spp. in the presence of M. anisopliae and the diameter showed no reduction against the pathogen.