Spruce budworm periodicity, and the use of geostatistics and GIS as Tools for analyzing pheromone trap data at a landscape level. 2000. Lyons, D.B.; Sanders, C.J.; Liebhold, A.M.; Jones, G.C. A report prepared for the Joint Meeting of the 18th Eastern Spruce Budworm Research work Conference and the spray Efficacy Research Group Workshop, 29 October - 2 November 2000, Fredericton, New Brunswick.7p.