Thistle, H., P. Shea, E. Holsten, and D. Caleche. 1999. Pheromone dispersal in a canopy trunk space-analysis of plume data. ASAE-CSAE-SCGR Annual International Meeting, Toronto, Ontario, Canada, 18-21 July 1999. ASAE Paper No. 991013. American Society of Agricultural Engineers (ASAE), St. Joseph, USA.