Inventory of Hymenoptera associated with forest plantations of Eucalyptus globulus Labill, in Imbabura and Pichincha

Abstract

Introduction:  The order Hymenoptera, considered as one of the most megadiverse, possesses a significant role in ecosystems, developing as pollinators, predators, parasitoids; proving to be a useful option to pests’ control since it does not require a significant investment and therefore turns out being economically viable. Objective:  The aim of this study is to know abundance and richness of Hymenoptera presented in forest plantations of Eucalyptus globulus in Pichincha and Imbabura provinces. Methodology:  For the inventory, yellow traps were used. Besides, two farms were placed per province, in each farm was stablished at three sample points with 3 altitudinal gradients. The recollection was conducted in 3 different dates. Diversity of Hymenoptera was assessed, in addition, presence and abundance of Anaphes nitens were sampled. Results: In farm Itulcachi (Pichincha, 3131 masl), 259 individuals belonging to 19 families were identified; farm Paluguillo (Pichincha, 3030masl) 218 individuals belonging to 17 families; farm Magdalena (Imbabura, 2920masl), 346 individuals belonging to 19 families were identified; farm Pisangacho (Imbabura, 2400 meters above sea level) 141 individuals belonging to 15 families. In all the sampled farms there is the presence of Anaphes nitens Huber. Conclusion:  Based on the correlation applied, it was determined that there is a relationship between altitude and abundance variables, the higher the altitude the lower the abundance, the lower the altitude the higher the abundance, thus existing the possibility of applying biological control in Eucalyptus globulus Labill plantations.