Evaluación de la capacidad antagónica de Trichoderma harzianum microencapsulada frente a Botrytis cinerea

Abstract

The blackberry crop has a high economic importance due to its medicinal and agroindustrial properties, its production faces problems caused by phytopathogens that cause significant economic losses, among which Botrytis cinerea stands out as the cause of gray rot disease. The control of this fungus has been demonstrated by organisms such as Trichoderma harzianum, however, the elaboration of products based on this biocontroller is unstable or inefficient, being microencapsulation an excellent alternative. For research purposes, conidia of T. harzianum were obtained by solid fermentation and these were microencapsulated by spray drying technique from maltodextrin and gum arabic, ionic gelation was performed by using sodium alginate. Two types of microencapsulation were used, as well as three incubation times, obtaining as a result that the ionic gelation treatment at three days of incubation was the best with a percentage of radial growth inhibition of 97.087 percent followed by ionic gelation at 2 days with a percentage of 94.174 percent, while the spray-drying treatment at 3 days was 85.435 percent. In the present research project, microencapsulation of T. harzianum conidia was carried out, evaluating its influence on the radial growth percentage of B. cinerea.