Within the Ceratopogonidae family, many genera transmit numerous diseases to humans and animals, while others are important pollinators of tropical crops. In the Yungas ecoregion of Argentina, previous systematic and ecological research on Ceratopogonidae focused on Culicoides, since they are the main transmitters of mansonelliasis in northwestern Argentina; however, few studies included the genera Forcipomyia, Dasyhelea, Atrichopogon, Alluaudomyia, Echinohelea, and Bezzia. Therefore, the objective of this study was to determine the presence and abundance of Ceratopogonidae in this region, their association with meteorological variables, and their variation in areas disturbed by human activity. Monthly collection of specimens was performed from July 2008 to July 2009 using CDC miniature light traps deployed for two consecutive days. A total of 360 specimens were collected, being the most abundant Dasyhelea genus (48.06%) followed by Forcipomyia (26.94%) and Atrichopogon (13.61%). Bivariate analyses showed significant differences in the abundance of the genera at different sampling sites and climatic conditions, with the summer season and El Corralito site showing the greatest abundance of specimens. Accumulated rainfall was the variable that related the most to the abundance of Culicoides (10.56%), while temperature was the most closely related variable to the abundance of Forcipomyia, Dasyhelea, and Atrichopogon.

El objetivo del trabajo fue determinar la abundancia y fluctuación poblacional de Bemisia tabaci (Gennadius) en cultivos de tomate y pimiento bajo cubierta en el departamento Lules, provincia de Tucumán (Argentina). Los muestreos entomológicos se realizaron desde julio de 2008 a marzo de 2009, recolectándose adultos mediante trampas adhesivas e inmaduros en los foliolos de los diferentes estratos de las plantas. Se recolectó un total de 121,075 individuos de B. tabaci, de los cuales 12,630 corresponden al estado de huevo, 8,718 a ninfa, 262 a pupa y 99,465 a adulto. En líneas generales, la abundancia de B. tabaci aumentó considerablemente a partir de la tercera semana de muestreo y se mantuvo elevada, siendo el cultivo de pimiento el que presentó mayor número de individuos.