Inventario de hymenoptera asociados a plantaciones forestales de Eucalyptus globulus labill, en la provincia de Pichincha.

Abstract

This study aimed to prepare an inventory of Hymenoptera associated with Eucalyptus globulus plantations in the province of Pichincha; a completely randomized block design was used with three treatments and three repetitions: three altitudinal gradients, and three sampling dates. The blocking factor was the collection dates. For the evaluation, 18 yellow traps were used, which were installed in 3 altitudinal gradients. The collections were made every 24 hours for three consecutive days; 50ml plastic bottles with 96% alcohol were used to preserve individuals. The samples were identified using dichotomous keys described by Borror and Delong in the book INTRODUCTION TO THE STUDY OF INSECTS. In addition, a collection of Gonipterus sp ootheca was carried out to determine the abundance and distribution of the parasitoid and thus implement rearing at the laboratory level. An ANOVA of richness and abundance of Hymenoptera, Shapiro Wilks normality tests, Homoscedasticity, and Shannon and Simpson indices were performed. Through the identification of Hymenoptera, it was determined that for the Itulcachi Farm, it was possible to detect the presence of 19 families corresponding to parasitoids, hyperparasitoids, and pollinators, the most representative being Diapriidae, Trichogrammatidae, Mymaridae. In comparison, for Paluguillo Farm, it was possible to identify the presence of 17 families, corresponding to parasitoids, phytophagous, and predators, being the most representative Diapriidae, Encrytidae, Ichneumonidae, Mymaridae, Braconidae. Based on the applied correlation, it was determined that there is a relationship between the variables of altitude and abundance since there is less abundance at higher altitudes. At lower altitudes, there is greater abundance. It is advisable to implement strips with flowers that act as a food supplement, refuge from natural enemies, and at the same time, allow an increase in the population of Anaphes nitens.