Excerpt from Late Blight and Rot of Potatoes Caused by the Fungus Phytophthora Infestans, De Bary These three processes of spore formation, germination and infection can take place only in the presence of sufficient moisture and a suitable temperature. Both spores and swarm spores are quickly killed by drought and sunlight. This partly explains why it is that, although the fungus is present in isolated plants from the time they reach the surface of the ground. It does not spread to any extent until a month, or perhaps two, later. Another reason may be that the plant is more susceptible at and after blossoming time than m its earlier stages. 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.