Impact of woody semi-natural habitats on the abundance and diversity of green lacewings in olive orchards

Habitat management is a conservation biological control technique which helps to reduce the use of inputs in olive orchards and also improve sustainability. Recent studies have pointed out that vegetation cover, provides food resources, as well reproduction refuge sites, increases Chrysopidae populations diversity. However, little known about effect woody semi-natural habitats (SNHs) orchards. In this context, our study aims determine attraction adult different tree species SNHs adjacent order promote key predator. We vacuumed 75 almond, oak, pine trees fortnightly between April October 2016. The were chosen at random evenly distributed among five organic selected according their availability. Oak recorded highest abundance, richness diversity levels Chrysopidae, while had abundance larvae. A total 20 green lacewing species, belonging seven genera, collected, Chrysoperla mutata (McLachlan, 1898), pallida Henry et al., 2002 Pseudomallada (prasinus) pp3 (Duelli Henry, 2020) most abundant during period preference for (C. C. pallida) oak P. pp3. Furthermore, number larvae collected showed positive correlation with percentage predated eggs anthophagous carpophagous generations Prays oleae.