ISSN: 0973-7510

E-ISSN: 2581-690X

Research Article | Open Access

Ma. Ángeles Valencia de Ita1, Jiménez Huerta Fátima2, Conrado Parraguirre Lezama1, Alfredo Báez Simón1, Gerardo Landeta Cortés3 and Omar Romero-Arenas1

1Agroecology Center, ICUAP, Benemerita Universidad Autonoma de Puebla (BUAP), Mexico.
2Superior Technological Institute of Tlatlauquitepec, Puebla, Mexico.
3University Center for Technology Linkage and Transfer, BUAP-CONACyT, Mexico.
J Pure Appl Microbiol. 2021;15(2):998-1005 | Article Number: 6954 | © The Author(s). 2021
Received: 26/03/2021 | Accepted: 05/05/2021 | Published: 01/06/2021

Diversity of the different types of chilies in Mexico has been scarcely studied, and a large variety have been found to be, such as Manzano chili. Root rot caused by oomycete Phytophthora capsici is a severe disease that affects Manzano chili production in Mexico, detracted from its production and quality. The use of biological control agents such as Trichoderma native’s species, represents an efficient alternative to reduce losses and control the disease. For this reason, the objective of the present investigation was to evaluate the antagonistic effect in vitro and in vivo of four native strains of Trichoderma spp., on Phytophthora capsici in seedlings of Manzano chili from Puebla-Mexico was evaluated. Dual culture technique was used to determine the percentage of inhibition of radial growth (PICR) of the PC-A strain of P. capsici. Analysis of the percentage of germination was also carried out, as well as the incidence of root rot at 20 days after inoculation with the pathogen (dai) in the nursery. T. harzianum strain presented the highest PICR (42.86%) of antagonistic level in vitro and class I in the Bell scale, in addition, it obtained 88% germination in the nursery and 10% mortality at 20 dai, higher than the other native strains of Trichoderma. The bio-controlling effect of strains of Trichoderma spp., offers an effective alternative for root necrosis caused by P. capsici in the cultivation of Manzano chili in Puebla-Mexico.


Antagonism, incidence of rot, PICR, nursery, mortality

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