Contrasting Phenotypic Variability of Life-History Traits of Two Feral Populations of Macrolophus pygmaeus (Hemiptera: Miridae) under Two Alternative Diets

Tuta absoluta is a major pest attacking tomato crops. This invasive species emerged in Europe (Spain) 2006, and 3 years later it spread to Portugal. In 2009/2010, was recorded for the first time Azores archipelago. Macrolophus pygmaeus predator widely used as biological control agent against leaf miner. study contrasted life-history traits population growth parameters of two feral populations M. pygmaeus, one from Portugal mainland The predators were tested on single prey diet, either Ephestia kuehniella eggs, factitious mass rearing mirids, or T. eggs. We predicted that would express differences its phenotypic characteristics, with Azorean displaying low performance due likely genetic diversity, expected insular populations. Our results revealed inexistence several life history traits, such immature developmental time, female longevity, males’ body weight sex ratio. Contrary our predictions, direct impact fitness, lifetime fertility (95.78 ± 14.23 vs. 61.38 13.52 nymphs), explain better performances Azores. females larger, matured earlier reproduced at higher rate longer periods, than females. Therefore, show positive advantage Azores, fed (time required doubling Ek: 8.42 0.50, Ta: 5.76 0.31 mainland, 10.88 1.94, 12.07 3.15). Biological similar when E. could be beneficial both optimize production pest. are discussed well fundamental perspective, seeking if can explained by lower diversity driven geographic isolation.