Suppression of Colorado Potato Beetle, Leptinotarsa decemlineata (Say), (Coleoptera: Chrysomelidae) Populations with Antifeedant Fungicides

Authors

J. Daniel Hare, Connecticut Agricultural Experiment Station, New Haven, CT.
Patrick A. Logan, University of Rhode Island
Robert Wright, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

October 1983

Comments

Published in Environmental Entomology Volume 12, Issue 5 (October 1983), pp. 1470 – 1477. © 1983 Entomological Society of America. Used by permission.

Abstract

Laboratory, small-field plot, and commercial-scale experiments were completed, using Connecticut, Rhode Island, and New York Colorado potato beetle, (CPB) Leptinotarsa decemlineata (Say), populations to determine if "antifeedant fungicides" might reduce the suitability of potato for CPB while simultaneously protecting potato from early and late blight. In the laboratory. fungicides formulated from triphenyltin hydroxide (TPTH) or Cu(OH), reduced CPB feeding 95 and 61%. In small-field plots, CPB larval densities were significantly reduced where TPTH and Cu(OH)₂ were used regularly. In commercial-scale experiments, L. decemlineata populations were significantly reduced and required fewer insecticide applications for acceptable control where TPTH was used regularly.