Efecto protector de una cepa nativa y de una comercial de Trichoderma spp en el cultivo de Fresa (fragaria x ananassa). Caso aplicado en la vereda Monteadentro del municipio de Pamplona, Norte de Santander.

Abstract

The genus Trichoderma occurs naturally in a significant number of agricultural soils. This includes species that are widely used in the agricultural sector and contribute to mitigating the damage caused by diseases in agroecosystems. Therefore, this study focused on obtaining a native strain of Trichoderma spp. with biocontroller potential for use in a strawberry crop (Fragaria spp.). For this, a comparative analysis was made with a commercial strain of Trichoderma spp. The in vitro tests were carried out on dual cultures, comparing the antagonistic capacity of the native strain isolated from the soil in a strawberry crop from Vereda Monteadentro Norte de Santander (TN01), a native strain isolated from the soil in a banana crop in the municipality of Bucarasica Norte de Santander (TN02), and the commercial strain (TH), against a Botrytis spp. strain, isolated in a strawberry crop in injured fruits. All the strains evaluated in vitro showed inhibition in the radial growth of the phytopathogen, finding significant differences between the antagonists. Regarding the mycoparasitic action, only the TN01 and TH strain presented this characteristic with a scale of grade 4. To evaluate the protective capacity in open field in strawberry cultivation, the TN01 strain was selected to compare with the commercial strain (TH) For this phase, a Completely Random Block Design (DBCA) was used, with 8 treatments and 3 repetitions. From the results obtained, it can be concluded that the native strain TN01 showed an efficacy comparable to that observed for the commercial strain.