María I. Zamar

TABLA DE VIDA Y FECUNDIDAD DE GARGAPHIA TORRESI COSTA LIMA (HEMIPTERA: TINGIDAE) SOBRE GIRASOL

El objetivo del trabajo es determinar la duracion del ciclo de vida, proporcion sexual, longevidad, fecundidad y tabla de vida horizontal por edades de Gargaphia torresi, especie danina a cultivos y plantas de jardin. Para ello se realizo: cria del insecto, ciclo vital y tabla de vida (cohorte de 220 huevos) en laboratorio, bajo las siguientes condiciones: temperatura 25 ± 2 oC; humedad relativa 67 ± 4% y fotoperiodo 12 hs luz - 12 hs oscuridad. Los resultados obtenidos fueron: tiempo de desarrollo de los estados inmaduros: huevos-ninfas 29,75 ± 1dia; longevidad de adultos: 29 ± 8 dias; proporcion sexual: 0,95. La tasa de mortalidad especifica de cada estadio (qx) fue: huevo: 0; ninfa I: 0; ninfa II: 0; ninfa III: 0,023; ninfa IV: 0,013; ninfa V: 0,014; la fecundidad (mx): 181 huevos/hembra y el indice reproductor neto (R0): 171,95. Estos parametros son de interes en programas de manejo agroecologico.

Mayflies in urban environments in the Province of Jujuy (Argentine Republic)

This work is part of a larger study which aims to know the synanthropic entomofauna of San Salvador de Jujuy, Argentina. Despite the numerous works on Ephemeroptera around the world there is no information about mayflies in urban environments. The aim of this study is to determine the diversity and abundance of mayflies recorded in the city of San Salvador de Jujuy, Argentina. The study was conducted in 32 homes of the city from November 2012 to October 2013. Two types of samplings were conducted: diurnal (with tweezers and brushes) and nocturnal (with light trap). The Ephemeroptera order is present in most of the neighborhoods of San Salvador de Jujuy because they are located near water bodies. There were 35 specimens belonging to seven species grouped into six genera and three families. The genera Baetodes Needham & Murphy and Leptohyphes Eaton were the most abundant, particularly during the rainy season. The results obtained in the present study represent the first contribution to the knowledge of Ephemeroptera present in synanthropic environments

Life cycle and reproduction of Caliothrips phaseoli (Thysanoptera: Thripidae) on Fabaceae and Solanaceae (Plantae) in laboratory conditions

The objectives of this study are to know the development time of each state and stage of Caliothrips phaseoli on Phaseolus vulgaris L. (Fabaceae), Cicer arietinum L. (Fabaceae), Nicotiana glauca Graham and N. tabacum L. (Solanaceae), the types of reproduction of these thrips and their index of masculinity. The study was conducted under the following ambient conditions: 25 ± 1 °C; 72 ± 6% relative humidity and 12h light/12h dark. For breeding, mature leaves of each plant were placed in dark glass bottles inside breeding cages. The development of each state and stage was inspected daily, counting also the number of individuals and the sex of emerged adults. It was found that N. glauca , P. vulgaris and N. tabacum are host plants of C. phaseoli . The pubescence density of C. arietinum limited the feeding and prevented C. phaseoli oviposition, therefore it could not represent an efficient host for these thrips. The average duration of the total cycle of C. phaseoli reached in the solanaceaes was higher in N. tabacum (20,6 days) and lower in N. glauca (16 days), while in the fabaceae ( P. vulgaris ) it reached an intermediate value (19 days). In N. tabacum and P. vulgaris it was the same since no significant differences were found between them. In all three plants, the state which needed more development time was the egg (6-8 days), followed by the larva II (4, 4.5 days), while the larva I and the quiescent states varied between 1.85 and 3.36 days. This species reproduces by amphigonia and parthenogenesis with exclusively male offspring in the latter case