1a. Objectives (from AD-416):
Studies show that aerosol insecticides can kill the red flour beetle and confused flour beetle in flour mills, and that aerosols also give residual control. In this project we will evaluate different aerosols applied from a portable application system, compare the residual control with aerosols applied through a fixed application system, and evaluate if the aerosols are dispersing to obstructed sites within a mill.
1b. Approach (from AD-416):
We will conduct studies to evaluate dispersion of aerosols in field sites using different aerosols applied from a portable application system, and compare the residual control with aerosols applied through a fixed application system. We will conduct experiments measuring spatial variation in treatment efficacy in food facilities. We will also conduct long-term monitoring studies of pest population levels and environmental conditions at various facilities.
3. Progress Report:
Significant progress was made on meeting the objectives of this project. Experiments were conducted within a flour mill to measure spatial pattern in the deposition of three different aerosol insecticide formulations at different temperatures. An experimental approach to measure the dispersal of aerosol insecticides under obstructions was also developed and utilized to evaluate different insecticide formulations. Experiments were also conducted in small sheds to assess the efficacy of aerosol insecticides against eggs, larvae, pupae, and adults of the red flour beetle and the confused flour beetle and the impact of food material provided both during and after treatment on efficacy. Experiments are evaluating the sublethal impacts of exposure to aerosol applications of insect growth regulator insecticides. This research is providing important information on the factors that limit the efficacy of aerosol insecticides and identifies ways to improve the effectiveness of these treatments. ARS PI monitoring activities to evaluate research progress included: phone calls/conference calls, site visits, and email communications.