Control of Macrophomina pseudophaseolina with Trichoderma spp. and botanical and chemical pesticides

Abstract

Chili is the most important traditionally consumed vegetable in Mexico; however, production is reduced by soil fungi. The objective of the research was to evaluate in in vitro, greenhouse and field conditions, the effectiveness of biological, botanical and chemical pesticides for the control of Macrophomina pseudophaseolina. In vitro, greenhouse and field experiments were carried out to evaluate the control effect of different pesticides for the control of M. pseudophaseolina. It was determined that all the evaluated strains of Trichoderma spp. They had a fungistatic effect against M. pseudophaseolina, and T. reesei showed the greatest antagonism and antibiosis against M. pseudophaseolina. High, medium and low doses of NeemAcar^® and high and medium doses of Regalia^® Maxx inhibited 100% the growth of M. pseudophaseolina mycelium. In the greenhouse, the lowest percentage of severity was obtained in the treatment with Regalia^® Maxx + T. reesei. In the field, the lowest severity was determined with the application of NeemAcar® CE + Headline®. The preventive or curative application of biological, botanical and chemical pesticides did not influence the severity of the disease.