Susceptibility of stored-product psocids to aerosol insecticides

George P. Opit,1,2a* Frank H. Arthur,2b James E. Throne,2c and Mark E. Payton3d

1Department of Entomology and Plant Pathology, Oklahoma State University, 127 Noble Research Center, Stillwater, OK 74078-3033, USA
2USDA-ARS Center for Grain and Animal Health Research, 1515 College Ave., Manhattan, KS 66502, USA
3Department of Statistics, Oklahoma State University, 301B MSCS Bldg, Stillwater, Oklahoma 74078-1056, USA

Abstract

The efficacies of commercial methoprene and esfenvalerate aerosols for control of stored-product psocid pests were evaluated in simulated field studies. The efficacies of methoprene, esfenvalerate EC, the carrier Isopar-M™, and a combination of methoprene and esfenvalerate aerosols for control of Liposcelis decolor (Pearman) (Psocoptera: Liposcelididae) and Liposcelis entomophila (Enderlein) nymphs were assessed, and the effects of direct and indirect exposure of Liposcelis bostrychophila Badonnel, L. decolor, and Liposcelis paeta Pearman adults to esfenvalerate EC aerosol were evaluated. The greatest nymphal mortality attained was 76%, indicating that the four aerosols tested were ineffective against L. decolor and L. entomophila nymphs. In the direct and indirect exposure studies, the greatest adult mortalities attained for the three psocid species were 62 and 32%, respectively. Based on these data, esfenvalerate aerosol is ineffective for control of L. bostrychophila, L. decolor, L. entomophila, and L. paeta psocid species. This study shows that methoprene, esfenvalerate EC, and a combination of methoprene and esfenvalerate aerosols were ineffective against the four psocid species tested when applied at rates that are usually effective against other stored-product insect pests.

Abbreviations: AI, active ingredient; IGRs, insect growth regulators
Keywords: esfenvalerate, methoprene, Psocoptera

Correspondence: a george.opit@okstate.edu, b frank.arthur@ars.usda.gov, c james.throne@ars.usda.gov, d mark.payton@okstate.edu, *Corresponding author

Editor: James Ottea was editor of this paper.

Received: 30 October 2011 | Accepted: 2 March 2012 | Published: 27 November 2012

ISSN: 1536-2442 | Volume 12, Number 139

Opit GP, Arthur FH, Throne JE, Payton ME. 2012. Susceptibility of stored-product psocids to aerosol insecticides. Journal of Insect Science 12:139. Available online: http://www.insectscience.org/12.139