Excerpt from Diseases of Cultivated Plants and Trees So widely spread and, it may be added, often so intelligent is the interest now taken in the incidence and the dissemination of the diseases which affect cultivated plants, and at the same time so important is a proper conception of the causations and the treatment of these diseases, that a work which deals with them cannot fail to be welcomed. Much has been and much is daily being done to advance our knowledge of plant-diseases and to increase our ability to cope with the practical difficulties that their presence creates. But the literature of the subject is so widely scattered, and the results of individual investigations so often tend, when settling some immediate difficulty, to create new difficulties, to open up new lines of research, and to indicate new principles of treatment, that in the absence of a compact, general review of the actual state of affairs, the practical man is apt to feel at a loss as to how matters really stand, and at times is disposed to doubt the soundness of the advice he is urged to follow. The conditions necessary for the preparation of such a work as is called for are in the first place an intimate knowledge of the labours of a host of investigators widely scattered throughout the world, with at the same time ready access to the literature in which these results are embodied. 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 Diseases of Cultivated Plants and Trees There are many causes which favour the spread and increase of disease at the present day, which had no existence in bygone times, perhaps the most potent is that commonly known as 'rapid transit.' Undoubtedly a change of seed is good, but, as experience has proved, you never know what disease you are intro ducing, and in many instances it is impossible to detect anything wrong until too late. The facility with which seeds, tubers, and even living plants can now be sent to the uttermost parts of the earth is a source of great danger from the point of view of introducing new diseases, and unless something in the way of a quarantine is insisted upon in every country, it appears highly probable that in course of time those diseases, which assume the proportions of an epidemic, Will be equally abundant wherever the host-plant is cultivated. Where total prohibition is not considered necessary, quarantine, which has answered so well in the case of animal diseases, might with advantage be applied in the case of fruit-trees, etc. The trees should be planted in some suitable place, and be examined from time to time by some qualified person. After a season's growth they might be allowed to pass into the country, if free from disease. I am quite aware that some people will say this idea is not practicable, and further, such precautions are -not necessary. There is certainly nothing impracticable; it is quite as easy to plant a tree in one place as another. The cost of a tree that has been in quarantine for a season would certainly cost more than it would at the moment of landing, but on the one hand the purchaser would secure a tree free from disease, whereas on the other hand the tree might prove to be infected With some disease. The fact that the most destructive diseases attacking fruit-trees and other plants in Europe, also eventually appear in whatever part of the world such trees are cultivated, is absolute proof that the disease has been conveyed along with the plant. 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.

The informal style used in this book has been well adapted for quick reference by arranging crops and plants by cultural groups (small grains, citrus fruits, etc.). All the information on diseases of any particular crop (sweet potato, lettuce, cottton, sorghum, cantaloupe, etc.) is in one place.