Impacts of a neonicotinoid, neonicotinoid-pyrethroid premix, and anthranilic diamide insecticide on four species of turf-inhabiting beneficial insects

Jonathan L. Larson, Carl T. Redmond, Daniel A. Potter

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

Many turf managers prefer to control foliage- and root-feeding pests with the same application, so-called multiple-targeting, using a single broad-spectrum insecticide or a premix product containing two or more active ingredients. We compared the impact of a neonicotinoid (clothianidin), a premix (clothianidin + bifenthrin), and an anthranilic diamide (chlorantraniliprole), the main insecticide classes used for multiple targeting, on four species of beneficial insects: Harpalus pennsylvanicus, an omnivorous ground beetle, Tiphia vernalis, an ectoparasitoid of scarab grubs, Copidosoma bakeri, a polyembryonic endoparasitoid of black cutworms, and Bombus impatiens, a native bumble bee. Ground beetles that ingested food treated with clothianidin or the premix suffered high mortality, as did C. bakeri wasps exposed to dry residues of those insecticides. Exposure to those insecticides on potted turf cores reduced parasitism by T. vernalis. Bumble bee colonies confined to forage on white clover (Trifolium repens L.) in weedy turf that had been treated with clothianidin or the premix had reduced numbers of workers, honey pots, and immature bees. Premix residues incapacitated H. pennsylvanicus and C. bakeri slightly faster than clothianidin alone, but otherwise we detected no synergistic or additive effects. Chlorantraniliprole had no apparent adverse effects on any of the beneficial species. Implications for controlling turf pests with least disruption of non-target invertebrates are discussed.

Original languageEnglish
Pages (from-to)252-259
Number of pages8
JournalEcotoxicology
Volume23
Issue number2
DOIs
StatePublished - Mar 2014

Bibliographical note

Funding Information:
Acknowledgments The authors thank A. J. Bixby-Brosi and David Williams for technical advice, E. K. Dobbs, A. J. Kesheimer, and A. A. Larson for field assistance and Ricardo Bessin for statistical advice. This work was supported in part by a grant from the United States Golf Association, and by the B.C. Pass Graduate Fellowship. This is paper number 13-08-018 of the Kentucky Agricultural Experiment Station. All experiments were conducted according to the rules and regulations of the University of Kentucky and the United States of America.

Keywords

  • Bifenthrin
  • Chlorantraniliprole
  • Clothianidin
  • Insecticides
  • Synergism
  • Turfgrass

ASJC Scopus subject areas

  • Toxicology
  • Management, Monitoring, Policy and Law
  • Health, Toxicology and Mutagenesis

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