Reduccion de poblaciones de Ralstonia solanacearum raza 2 (Smith) en platano (Musa AAB Simmonds) con aplicacion de extractos de Trichoderma sp. (Alexopoulus y Mims) y bacterias antagonistas

• Published in: Acta agronomica (Palmira) 2014-01, Vol.63 (1), p.80
• Main Authors: Ceballos, Germán, Álvarez, Elizabeth, Bolaños, Martha M
• Format: Article
• Language: eng ; spa
• Subjects: Agronomy; Bacteria; Plant diseases; Vegetables
• ISSN: 0120-2812; 2323-0118

Moko, bacterial disease caused by Ralstonia solanacearum race 2, affects plantain production in Colombia, with losses up to 100 %. The in vitro effect of crude ltrates of strains of Trichoderma spp. and two commercial products were evaluated versus R. solanacearum. In vitro, ltrate was used (40 % in aqueous solution) for each strain of Trichoderma spp.; from R. solanacearum a dilution of 10-4 per Petri dish was used, in a completely random design with three replications. For Ralstonia solanacearum, the number of colony forming units was determined. In greenhouse, the suspensions of Trichoderma harzianum (Agroguard ), T. viride 14PDA3A, and Ecoterra were applied to Dominico harton plantain plants, and 30 days later plants were inoculated with R. solanacearum, a randomized complete blocks design with four blocks was used. R. solanacearum severity was evaluated by leaf symptoms scale, of 0 to 6. In vitro, crude extracts of two strains and two commercial products of Trichoderma spp. inhibited 100% of R. solanacearum. T. viride and Ecoterra treatments showed low levels of disease severity by R. solanacearum in plants (0.63 and 1.88 respectively).