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Aerosol distribution and efficacy in a commercial food warehouse

Permanent URL:
http://handle.nal.usda.gov/10113/28940
Abstract:
A series of field trials were conducted in a commercial food storage facility to evaluate exposure of stored-product insects to aerosol formulations of synergized pyrethrins and the insect growth regulator methoprene. When adults of Tribolium castaneum (Herbst), the red flour beetle, and Tribolium confusum (Jacqueline DuVal), the confused flour beetle were exposed with and without a food source to synergized pyrethrin aerosol, there was no difference in adult mortality with respect to availability of food at either 7 or 14 days after exposure (P>= 0.05). However, mortality was lower in T. confusum (40.4% and 79.3% with flour at 7 and 14 days, 38.9% and 84.8% without flour at 7 and 14 days) compared to T. castaneum (96.5% and 99.8% with flour at 7 and 14 days, 91.0% and 98.7% without flour at 7 and 14 days). Few late-stage larvae and pupae of either species exposed to the pyrethrin aerosol emerged as adults. In tests with methoprene aerosol, adult emergence of exposed 3-and 4-week-old larvae of T. confusum was less than 2%. Only 0.3% of 4-week-old larvae of T. castaneum exposed in open and obstructed areas emerged as adults. Emergence of adults from eggs of Plodia interpunctella (Hübner), the Indianmeal moth, embedded in culture media and exposed to the methoprene aerosol was 13.2%± 3.5%. Results show that the aerosols evaluated in our study could give effective control of some of the major stored-product insect pests in commercial food storage facilities, and may offer an alternative to fumigation.
Author(s):
Arthur, Frank H.
Subject(s):
Tribolium castaneum , Tribolium confusum , Plodia interpunctella , storage insects , insect control , pyrethrins , methoprene , aerosols , spatial distribution , mortality , food availability , flour , food storage , stored product protection
Format:
p. 133-140.
Note:
Includes references
Source:
Insect science 2008 Apr., v. 15, no. 2
Language:
English
Publisher:
Oxford, UK : Blackwell Publishing Ltd
Year:
2008
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
File:
Download [PDF File]
Rights:
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.