Abstract

CASTRO DEL ANGEL, E; SANCHEZ ARIZPE, A.; GALINDO CEPEDA, M. E.  and  VAZQUEZ BADILLO, M. E.. Biological control of ear rot on maize genotypes with Trichoderma species. Revista bio ciencias [online]. 2020, vol.7, e965.  Epub Apr 28, 2021. ISSN 2007-3380.  https://doi.org/10.15741/revbio.07.e965.

Maize is exposed to a number of phytopathogens throughout its phonological cycle, among which Fusarium, Ustilago, Aspergillus, Penicillium, and others. Some of these genera produce toxic substances called mycotoxins, which represent a high risk for human health and that of the animals that consume them. The objective of this study was to evaluate the effectiveness of three strains of Trichoderma for the control of ear rot in four maize genotypes; the experiment was carried out under rainfall conditions and natural infection by F. verticillioides. Four inoculated maize genotypes and without inoculating with Trichoderma spp., were planted. Three treatments were tested, seed inoculation, application by spraying and the application of the previous two together. The incidence of ear rot and the severity of the disease were determined. The severity of the disease was low in all three treatments, the seed treatment and spray application evaluated together had the lowest severity compared to the control. The three Trichoderma species reduced the incidence and severity of the disease in the three methods used, T. harzianum was the strain that significantly (p < 0.0001) controlled the disease, with more than 70 % effectiveness in all treatments.

Keywords : Effectiveness; incidence; severity; Fusarium verticillioides.

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