No abstract

The presence of Drosophila suzukii (Matsumura) associated to blackberry crop var. Prime-Ark (Rubus L. subgenus Rubus Watson) is recorded for the first time in Mendoza, Argentina. The western distribution boundary in Argentina is broadened. KEYWORDS. Berries. Exotic pest. Spotted wing drosophila. RESUMEN. Se cita por primera vez en Mendoza, Argentina a Drosophila suzukii (Matsumura) asociada al cultivo de zarzamora variedad Prime-Ark (Rubus L. subgen. Rubus Watson) y se amplía el límite oeste de distribución de la misma en el país.

Life table and population parameters of Lobesia botrana (Den. et Schiff.) under laboratory conditionsABSTRACT. Lobesia botrana Den. & Schiff. is a quarantine pest for Argentina. Its recent introduction in Mendoza requires studies of life cycle and population parameters. The aim of this work is to construct a horizontal life table, determine the demographic parameters, the average duration of the pre -reproductive, reproductive, post -reproductive periods, adult longevity, fecundity and fertility under laboratory conditions. The demographic parameters of L. botrana obtained were: intrinsic rate of increase (rm) of 0.137, net reproductive rate (Ro) of 66.82, mean generation time (T) of 30.51, finite rate of increase (λ) of 1.073, and the doubling time (D) of 9.76 days. The gross fecundity obtained (Mx) of 134.84 ± 15.68 eggs per female, the mean duration in days of pre-reproductive periods was 1 ± 0.81, the reproductive 6.25 ± 1.25 and the post-reproductive period of 2 ± 0.68, female longevity 9.25 ± 1.67 and male 8.64 ± 0.83 days.

Exclusive to the Neotropical region, leaf cutter ants are considered agricultural pests, although they can also have a positive effect on plants. In Mendoza vineyards, vegetal biodiversity is minimal, therefore they cut off this plant as a feeding resource. Acromyrmex lobicornis Emery it is mostly nocturnal and forages according to temperature. Foraging and maintenance activity was measured monthly in 14 colonies, throughout a full day at fourhour intervals, from October 2019 to March 2020. Acromyrmex lobicornis showed different seasonal patterns of foraging activity. Foraging intensity was highest throughout January and February, intermediate during December, and lowest in October and November. A bimodal feeding pattern was observed, foraging both day and night avoiding the hottest hours. The maximum collection of fragments was observed in the range of 10 and 19 °C, less between 20 - 39 °C, minimum between 40 - 49 °C and null between 0 - 9 °C. The nest - maintenance activity was maximum between 20 - 29 °C, less between 30 - 39 ° C, minimum between 40 - 49 °C and null between 0 - 20 °C.

No abstract