Author : George Perkins Clinton
Publisher : Forgotten Books
ISBN 13 : 9781333317577
Total Pages : 54 pages
Book Rating : 4.3/5 (175 download)
Book Synopsis Apple Scab (Classic Reprint) by : George Perkins Clinton
Download or read book Apple Scab (Classic Reprint) written by George Perkins Clinton and published by Forgotten Books. This book was released on 2016-08-23 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Apple Scab At this time it was not known to the writer that the latter had been suspected by others as the permanent stage of the apple scab fungus. An examination of literature, however, showed that Goethe as early as 1887 had suggested the relationship of the scabs of pears and apples to mature stages on the dead leaves that Bre feld in 1891 figured a temporary spore stage obtained from a Ven turia on pear that was similar to the leaf scab of that plant and that Aderhold, 1894 and later, had made a very comprehensive study of the scabs of apple, pear, and cherry and had connected them with species of Venturias that develop on the dead leaves of these hosts. From the results of these and the writer's investigations there is no doubt that apple scab is merely a parasitic summer stage of a permanent saprophytic fungus occuring on the fallen leaves. It also appears to be this latter form that is largely (in its immature condition) responsible for carrying the fungus through the winter. At least the writer has been unable to find any satisfactory evi dence that the scab stage persists on the young twigs, as has been stated by some investigators, and by means of a new crop of scab spores in the spring spreads the disease to the young fruit and leaves. Neither was there found any evidence that the old spores lived over the winter on the fallen leaves, or that the mycelium in these gave rise to a new crop for spring infection. 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.
