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.

Excerpt from The Climatic Distribution of Blister Rust on White Pine in Wisconsin The height of cankers above the ground also was recorded for the two areas Trees ranged from seedling-size to 100 feet in height. Forest - 3 had 251 cankers less than 2 feet from the ground, 56 from 2 to 4 feet, 23 from 4 to 6 feet, and 8 cankers more than 6 feet above the ground. Oi 13 cankers for which height was recorded on 0neida-5, 9 were less than 2 feet above the ground and 4 were 2 to 4 feet. Honey (1942) reported that in Brown County (eastern H plot in fig. 1) 98 percent of 307 cankers were within 6 feet and all cankers were within 10 feet of the ground. These results suggested that rust infection was dependent on moisture near the ground. Cankers occurred higher in Forest-3, a favorable area, than in 0neida-5. A preponderance of the blister rust infection in all of Wisconsin took place near the ground, but in the northern part of the State occasional cankers higher in the trees were observed. 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.

Excerpt from White-Pine Blister Rust in the Western United States Do not plant black currants. To do so is to help the blister rust to become rapidly and firmly established in the West and thus to destroy the valuable western white -pine forests. 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.