Excerpt from The Rhabdocline Needle Cast of Douglas-FirWilson and Wilson (70) first reported the disease in Europe in 1926, and described its symptoms on two varieties of Douglas-fir in Scotland. They traced the development of the fungus in the needles and gave the first summary of the life history of the fungus. The initial infection in Scotland was believed to have originated from Douglas-fir transplant stock imported from the Northwestern United States and Canada. Wind dissemination of ascospores was suggested as the probable source of a second infection in an area eight miles from the first.Boyce (2) in 1926 reported the epidemic nature of the fungus on Douglas-fir in Scotland as contrasted to its endemic nature in its native habitat. He observed the apparent immunity of the fast growing green strain of Douglas-fir. A year later, however, Boyce (3) suggested the possibility of fungus adaptation to the green strain.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.