Aplicación del análisis de sendero a la época del incremento poblacional de Opsiphanes cassina Felder (Lepidoptera: Nymphalidae), en palma aceitera

Abstract

At the Palorica farm, Monagas State, Venezuela which owns 289 ha of oil Palm, obtained from the genetic material Deli x Avros, 1989, population fluctuation was determined and path analysis was applied to seasonal population increase of Opsiphanes cassina Felder (Split-banded owlet). The experimental area comprised 10 ha, moths were quantified through capture using 20 traps, which were prepared with a suspension of 1 L of molasses, 15 g of yeast, and 10 g urea dissolved in ½ L of water. The weekly samplings were made during the period: February/2001 to February/2002. In each evaluation the total moths in MTD (moths/tramp/day) was determined. The records of climate information were obtained from the INIA meteorological station, San Agustín de la Pica, Maturín municipality, Monagas Venezuela. The insect showed five and a half generations per year; the population raises were during the months January, March, May, July, September, and November, depending, largely on, the pest insect s biology. The path analysis, allowed identifying the rainfall as the climatic variable of effect-cause among the studied variables which should be considered in a prediction model for population studies.