Predation of Cabbage Looper, Trichoplusia ni , 1 Pupae by the Striped Earwig, Labidura riparia , 2 and Two Bird Species 3

Publisher Website
Google Scholar
Abstract
The effectiveness of the striped earwig, Labidura riparia (Pallas), as a predator of the rupal stage of the cabbage looper, Trichoplusia ni Hübner, was investigated by affixing laboratory-reared pupae to the undersides of cabbage leaves in the field and counting the number of pupae eaten per day. Two bird species the savannah sparrow Passerculus sandwichensis savanna (Wilson), and the palm warbler, Dendroica palmarum palmarum (Gmelin), were also significant predators which actively searched for and consumed pupae. By examining placed pupae both morning and evening, it was possible to ascertain the mortality caused by the earwig, the savannah sparrow, and the palm warbler. Both earwigs and sparrows were highly effective predators and consumed from 4 to 90% of the placed pupae over a 3-day period.