title: Beyond Focal Pests: Impact of a Neonicotinoid Seed Treatment and Resistant Soybean Lines on a Non-Target Arthropod.
abstract: Integrated pest management (IPM) tactics may effectively control focal pests, but it is also important to test the compatibility of different tactics, and consider non-target organisms. We investigated the effects of a neonicotinoid seed treatment andRagresistance genes used for soybean aphid (Aphis glycinesMatsumura) control on reproduction of a non-target herbivore (twospotted spider mite,Tetranychus urticaeKoch) in short-term greenhouse experiments. We also examined interactions between spider mites and a specialist phytoseiid mite [Ambylseius fallacis(Garman)] and assessed the effects of a co-occurring opportunistic omnivore [Frankliniella occidentalis(Pergande)] by including thrips density as a covariate. There were no interactive or main effects of the presence ofRaggenes on the densities of any of the arthropods. Overall, effects of the seed treatment on spider mite densities varied, with no difference when mites were confined in clip cages, and higher populations on seed-treated plants when on whole plants. Predatory mites had a consistent negative impact on spider mites, and densities ofA. fallacisimmatures were similar between seed treated and non-seed treated plants. However, the relationship between spider mite and thrips densities was different between these two plant types, but only in the clip cage experiment lacking predatory mites. This research highlights the importance of considering how IPM tactics might affect non-target organisms.
authors.affiliation: Department of Plant Protection, Agricultural Faculty, Kahramanmaraş Sütçü İmam University, Avşar Campus, Kahramanmaraş 46040, Turkey. tulin@ksu.edu.tr.
authors.forename: Tülin
authors.initials: T
authors.lastname: Özsisli
authors.affiliation: Department of Entomology 7650, North Dakota State University, PO Pox 6050, Fargo, ND 58108, USA. Deirdre.Prischmann@ndsu.edu.
authors.forename: Deirdre A
authors.initials: DA
authors.lastname: Prischmann-Voldseth
keywords: Ambylseius fallacis; Tetranychus urticae; host plant resistance; thiamethoxam