Resumen

REBOLLEDO R, Ramón; VILLEGAS R, Guillermo; KLEIN K, Carlos  y  AGUILERA P, Alfonso. Population Dynamics, Predatory Capacity and Longevity of Nabispunctipennis Blanchard (Hemiptera: Nabidae). Agric. Téc. [online]. 2005, vol.65, n.4, pp.442-446. ISSN 0365-2807.  http://dx.doi.org/10.4067/S0365-28072005000400010.

The objective of the present research was to study the population dynamics, predatory capacity and longevity of adult Nabis punctipennis Blanchard fed on the aphid Acyrtosiphon pisum (Harris). The population dynamics were determined using hits an entomological net in an alfalfa (Medicago sativa L.) field located at Maipo Experimental Station of the University of La Frontera, Temuco, Chile. To evaluate the predatory capacity of the bug, 10 nymphs and 10 adults of N. punctipennis were selected and put individually in plastic vials, to which were added aphids (Acyrtosiphon pisum) which were renewed every 24 hours. To study the longevity of N. punctipennis, 10 newly emerged adults were put in plastic jars with aphids. The results of the population dynamics indicated a maximum of 90 specimens (November 1998) and a minimum of only one (April 1999). The mean daily predatory capacity of adults was 12.4 ± 4.8 aphids and 9.1 ± 3.07 aphids for the nymph. The nymph as well as the adult of N. punctipennis fed preferentially on adult aphids rather than nymphs. Finally, the longevity of adult N. punctipennis was 59.9 ± 25.34 days.

Palabras clave : population dynamics; predatory capacity.