Enhanced biocontrol services in artificially selected strains of Orius laevigatus

Abstract Augmentative biological control in protected crops relies mainly on omnivorous predators. Their performance as agents (BCA) depends several characteristics of the species, which turn may differ among strains within a species. We have recently reported achievement two Orius laevigatus (Hemiptera: Anthocoridae) showing significant larger body size or better fitness when feeding pollen, having key impact field performance. However, selection towards specific trait might result trade-offs, such reduced predation capacity, impair efficiency. Therefore, capacity these selected populations was tested laboratory first step prior to its use. Functional response different densities Frankliniella occidentalis (Thysanoptera: Thripidae) (adults and larvae) Myzus persicae Aphididae) (nymphs) were studied large-sized pollen-tolerant O. comparison with commercial wild populations. A type-II functional observed regardless population. Body significantly related thrips but not aphid predation. The strain showed superior both larvae especially adult thrips, although aphids. increase effectiveness BCA thrips. Regarding strain, no trade-offs rates adults it higher nymphs, suggesting an expanded prey range. Implications enhanced biocontrol services crop protection are also discussed.