This study’s main objective was to determine how the incidence of blister rust has changed since the mid-1900’s. Five separate regions of New Hampshire were surveyed in 1998 for the presence of white pine blister rust. Survey regions consisted of the north country, upper valley, southwest, southeast, and east central zones of the state. In each of these regions, approximately 20 sites were established and at each site, five subplots of 10 white pine trees were systematically sampled. To get comparable infection level data from past decades, we searched for statewide surveys done by foresters or researchers.
January 8, 2017