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Case Study: A Practical Application of an Aerosol Treatment in a Commercial Mill

USDA—Agricultural Research Service Center for Grain and Animal Health Research Center, 1515 College Ave, Manhattan, KS 66502, USA
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Insects 2019, 10(5), 150; https://doi.org/10.3390/insects10050150
Received: 27 March 2019 / Revised: 7 May 2019 / Accepted: 14 May 2019 / Published: 25 May 2019
(This article belongs to the Special Issue Improving Stored Product Insect Pest Management)
In recent years, there has been an increasing interest and need for alternatives to structural fumigations, and one alternative that has been used across the industry is aerosol insecticides. Previous tests inside a pilot-scale mill demonstrated that aerosol particle size, delivery method, and the spatial configuration of the mill all influenced effectiveness. However, there is no research conducted inside large commercial facilities. The objective of this research was to evaluate a pyrethrin-plus-methoprene aerosol application inside a commercial mill on adult Tribolium confusum Jacquelin duVal, confused flour beetle, directly exposed to the aerosol and residual effects on larvae. Additionally, five aerodynamic particle sizer spectrometers were placed in the facility and recorded instantaneous spray concentration and estimated aerosol deposition. Adult T. confusum exposed nearest to the aerosol application points had the highest percentage of affected adults (>60%). The aerosol also had vertical movement when released at the top of a three-story open room; instantaneous concentrations were recorded on the ground floor. The aerosol residual was highly effective after 6-weeks post aerosol exposure, as 80% of the bioassays did not have any adult emergence from exposed larvae. This research demonstrates a practical use of aerosol insecticides and their potential to be an effective alternative to structural fumigations. View Full-Text
Keywords: Aerosol insecticides; commercial mill; Tribolium confusum; efficacy; deposition Aerosol insecticides; commercial mill; Tribolium confusum; efficacy; deposition
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Scheff, D.S.; Brabec, D.; Campbell, J.F.; Arthur, F.H. Case Study: A Practical Application of an Aerosol Treatment in a Commercial Mill. Insects 2019, 10, 150.

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