Evaluación de la fluctuación de Bactericera cockerelli Sulc. y las palomillas en cultivos establecidos de Solanum tuberosum L. en La Dolorosa, El Panecillo, barrio El Norte, Tungurahua.

Abstract

The objective of this research work was to evaluate the fluctuation of Bactericera cockerelli Sulc. and moths in established crops Solanum tuberosum L. in La Dolorosa, El Panecillo, Barrio el Norte, Tungurahua; through 5 biweekly samplings for B. cockerelli and ten weekly samples for moths, from August 18 to October 20, 2021. Three zones with different altitudinal gradients were selected: a high zone (3450.8 m.a.s.l.), a medium zone (3400.56 m.a.s.l.), and a low zone (3278 m.a.s.l.), which were in the sectors of La Dolorosa, El Panecillo and Barrio el Norte. It was monitored the psyllid population in egg and nymph stages by applying the oviposition and destructive methods, for which plants were chosen randomly and carefully observed with a magnifying glass; the adult population was determined by using an entomological net and chromatic sheets located in the center of the crops. Finally, it was determined the fluctuation of the moth population and the traps with sex pheromones were applied. In the statistical analysis, the Friedman test was used for eggs, nymphs, and adults of paratrioza in the five samplings carried out, resulting in significant differences only for the egg and nymph stages. On the other hand, the highest moth population was attributed to Phthorimaea operculella as opposed to Tecia solanivora and Symmestrischema tangolias. It was concluded that in the three study areas, there is only significance for eggs and nymphs of the psyllid and that the largest population of moths was attributed to Phthorimaea operculella, so it is recommended to continue researching to control the population of these pests.