Excerpt from Incidence of White Pine Blister Rust Infection in the Lake States Sample plots were randomly selected in areas given ribes eradication treatment since 1952. When a pine area is treated, essentially all ribes bushes are destroyed and the number removed is recorded. Ribes populations per acre, at time of treatment, on areas surrounding sam ple plots were computed from these ribes eradication records. Thus for each plot, general ribes population at the time of working the area could be correlated with the rate of fatal rust infection origi nating during years immediately preceding eradication treatment. This eradication treatment was the first on about two-thirds of all areas examined, while the remaining third had been previously treated one or more times. The plot data collected therefore provide some comparisons of conditions on untreated areas and areas previously treated but not under control. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.