Resumen

LARIOS LARIOS, Edgar Javier et al. Biocontrol of Damping off and promotion of vegetative growth in plants of Capsicum chinense (Jacq) with Trichoderma spp. Rev. Mex. Cienc. Agríc [online]. 2019, vol.10, n.3, pp.471-483.  Epub 30-Mar-2020. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v10i3.332.

The objective of the study was to determine the effectiveness of Trichoderma spp. in the reduction of the incidence of Damping off and promotion of vegetative growth of Capsicum chinense (Jacq.) var. ‘Chichen Itza’. The foliar application was evaluated, through a complete randomized design, of two native strains of Trichoderma sp. (SP6 and Clombta), the co-application of both, a commercial product (Tri-HB®: Trichoderma harzianum and Bacillus subtilis) and a chemical fungicide (Captan®). During the study period, plants treated with Trichoderma sp. Clombta and with the co-inoculation of Trichoderma sp. Clombta + Trichoderma sp. SP6 showed no symptoms of Damping off. In contrast, plants treated with Captan® and Tri-HB® showed the highest cumulative incidence percentages with 5 and 4.5%, respectively. Also, at 28 days after germination, plants treated with Trichoderma sp. Clombta had a higher height (11 cm), stem diameter (2.6 mm), aerial biomass (fresh= 0.8 g plant-1 and dry= 0.13 g plant-1) and root volume (fresh= 0.13 g plant-1 and dry= 0.04 g plant-1), in comparison to the rest of the treatments evaluated. For the formation of leaves (9.1 leaves plant-1), leaf area (10.2 cm2) and chlorophyll index (Clombta= 209.9) the application of Trichoderma sp. Clombta stood out again with the highest values (p< 0.05), with respect to the applications of Captan® and Tri-HB®. According to the results obtained, it was determined that the strain of Trichoderma sp. Clombta at a concentration of 1x1013 conidia mL-1 was effective for the management of Damping off and promotion of vegetative growth of C. chinense var. ‘Chichen Itza’.

Palabras llave : biological fungicide; chlorophyll index; habanero pepper; incidence.

        · resumen en Español     · texto en Español | Inglés     · Español ( pdf ) | Inglés ( pdf )