Caracterización de agentes causales de enfermedades en el cultivo de mora (Rubus glaucus) en la finca manantial en la vereda sabaneta, municipio de La Vega, Cundinamarca

Abstract

Blackberry cultivation offers alternative production options for export and by-product processing nationwide. However, this crop is susceptible to various pathogens that impact product quality and profitability. Therefore, the objective of this research was to characterize pathogens in blackberry cultivation. This study was conducted at the El Manantial farm in the municipality of La Vega, Cundinamarca. A systematic sampling of 10% of the total blackberry plants was carried out, observing signs and symptoms. The collected samples were diagnosed by direct imprinting and a humidity chamber; an incidence of 34.8% of Collectotrichum, 18% of Alternaria, and 15.8% of Oidium was found. Pathogens such as Peronospora, Botrytis, Phoma, and others were also observed. Of the observed microorganisms, Collectotrichum sp and Fusarium sp were isolated to evaluate chemical and biological control from three treatments T:O (Copper oxychloride), T:N (Nystatin) and T:T (Trichoderma harzianum) at concentrations of 1:10 and 1:20. These treatments were subjected to an analysis of variance, concluding that the best concentration is 1:10 for the three treatments. On the other hand, an inhibition comparison was made according to the Elías and Arcos scale (1984) and it was observed that the biological treatment is more effective having degrees of affectation higher than the scale. Therefore, treatment with Trichoderma harzianum as a biocontroller could be a sustainable alternative in the control of phytopathogenic agents in blackberry crops.