Fluctuación de psílido de (Bactericera cockerelli Sulc.) y las palomillas en cultivos establecidos de papa (Solanum tuberosum L.) en tres localidades de Riobamba.

Abstract

This investigation aimed to evaluate the fluctuation of the population of potato psyllid (Bactericera cockerelli Sulc.) and moths in established potato crops in three places in Riobamba canton from July and September 2021, the data collection was carried out in Puruhuay, Pungalá and Molobog. These places were selected with similarity in phenological stage, and altitudinal difference, in each lot were placed four yellow traps to catch adults of B. cockerelli.) and at the same time, random monitoring was carried out on 10 plants per lot to measure the fluctuation of the population of eggs, nymphs and adults of the psyllid. For the respective evaluation of the moths, pheromone traps containing soapy water were placed in the selected plots. A non-parametric Friedman's analysis was used for (B. cockerelli), resulting in a significant difference among localities, so that in Molobog 200 adults and 566 eggs were collected, in Pungalá 104 adults and 172 eggs, and in Puruhuay no individuals of the psyllid were recorded. For the statistical analysis of the moths, a Randomized Complete Block Design in series was used, where its p-value = <0.001 was significant in the interaction locality*moth, resulting in the presence of (Tecia solanivora) in the three places, in Molobog 391, Pungalá 306 and Puruhuay 200 individuals were obtained, for (Phthorimaea operculella) a greater presence of individuals was identified in Molobog with Pungalá 374, and 93 Puruhuay individuals 36. It is concluded that due to the different altitudes and environmental conditions for both (B. cockerelli) and moths there is a constant fluctuation in the middle and low zones. It is recommended to continue with the study for the identification of entomopathogens.