L. L. Harter
Published: 2016-11-26
Total Pages: 732
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Excerpt from Phytopathology, Vol. 12: Official Organ of the American Phytopathological Society; January-December, 1922 The immature first year cones become infected at an early stage in their development, and within two or three months after they emerge many often exceed the size of the second year uninfected cones (pl. V, fig. A) home on the same tree. So far observations do not include infection of these two year old healthy cones. During the first of March many infected scales bearing pycnia may be observed accompanied by immature aecia within the cortical layers of the cone scale tissue im mediately beneath. With the maturity of the parasite, the infected cones have become abnormally enlarged and each individual swollen scale has a reddish color which is at first an orange chrome, becoming later a Sanford 's brown or chestnut.l With the rupturing of the aecial cavities and the sloughing o of the diseased cone scale tissue above, powdery masses of cadmium yellow spores are laid bare, (pl. V, fig. B, ) which entirely cover the cone. Excessive hypertrophy results, and the cones present a large swollen mass or gall, externally still showing the identity of each individual scale, but in longi-section, showing partial fusion of the scales. 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."