Early-Season Host Switching in Adelphocoris spp. (Hemiptera: Miridae) of Differing Host Breadth

摘要: The mirid bugs Adelphocoris suturalis (Jakovlev), lineolatus (Goeze) and fasciaticollis (Reuter) (Hemiptera: Miridae) are common pests of several agricultural crops. These three species have vastly different geographical distributions, phenologies abundances, all which linked to their reliance on local plants. Previous work has shown notable differences in spp. host use for overwintering. In this study, we assessed the extent each relies some its major overwinter hosts spring development. Over course four consecutive years (2009–2012), conducted population surveys 77 plant from 39 families. During spring, A. used broadest range hosts, as it was found 35 species, followed by (15 species) (7 species). Abundances greatly differed between plants, with reaching highest abundance Chinese date (Ziziphus jujuba Mill.), whereas both preferred alfalfa (Medicago sativa L.). breadths subsequent winter seasons. generalist exhibited least fidelity, using 8 22 4 12 development, respectively. By contrast, comparative specialist relied 9 11 plants early-season hosts. We highlight important seasonal changes breadth interspecific switching behavior findings benefit our understanding evolutionary interactions can be guide management.