2011 Annual Report 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 has been made in cooperation with other collaborators on initiating this grant funded research project on the evaluation of aerosol insecticides as part of an Integrated Pest Management (IPM) program. The goal of this research is to determine how IPM programs could function as alternatives to regular structural fumigations since use of the most widely used fumigant, methyl bromide (MB), is being phased out. Planning meetings were held to coordinate the conducting of aerosol treatment evaluations under different temperature conditions and the scheduling of a training conference. Initial experiments were run using one aerosol insecticide to evaluate its ability to penetrate into obstructed areas and into accumulated flour spillage. Research was initiated to evaluate the ability of regular aerosol insecticide applications of pyrethrin and insect growth regulators to suppress red flour beetle population growth in hidden areas not directly treated. Experiments were also conducted to determine if aerosol depositions could be better quantified, to facilitate the measurement of spatial pattern in droplet deposition. Experimental protocols were developed and cooperators identified for the evaluation of IPM programs in commercial facilities. This integrated project supports discovery and implementation of practical pest management alternatives to MB through research in pilot scale and commercial facilities, and involves detailed educational and technology transfer activities that promote adoption of MB alternatives by food industry stakeholders.