Effect of biopesticides on the incidence of foliar pests and diseases and yield components of common bean (Phaseolus vulgaris L.) in Santa Rosa de Copán

Abstract

The damage caused by pests and diseases is one of the factors that affect the national production of beans (P. vulgaris) as they attack all organs and stages of growth, production and storage; In order to evaluate the effect of biopesticides on the incidence of pests and foliar diseases in common bean (P. vulgaris) in Santa Rosa de Copán during the January-April 2017, two trials were carried out: the first consisted of evaluating the control of biopesticides on the incidence of pests; and in the second, the incidence and severity of foliar diseases were evaluated, both cases were contrasted biopesticides with a chemical chemical and an absolute, the application of them was carried out in the phases V4 (vegetative) and R5 (regenerative, pre-flowering). The variables considered are aimed at evaluating pests, the most common diseases that appeared in the field, and performance variables. The results differ significantly compared to P0.05, where the leaves with more frequency were Salta leaves (Empoasca kraemeri), White fly (Bemishia tabaci), Diabrotica (Diabrotica balteata), at the same time with the presence of biological controllers such as Orius insidosus; The diseases with greater presence were Angular spot (Phaseoisariopsis griseola) and Roya (Uromyces appendiculatus). In the performance variables there were significant differences with respect to the absolute control. Engeo 24.7 SC to 1L.ha-1 and Amistar xtra 28 SC at the same dose in a preventive manner.