Download or read book Diseases of Cultivated Plants and Trees Classic Reprint written by George Massee and published by Forgotten Books. This book was released on 2017-09-16 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Diseases of Cultivated Plants and Trees written by George Massee and published by . This book was released on 1913 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diseases of Cultivated Plants and Trees written by George Massee and published by Forgotten Books. This book was released on 2015-06-27 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Diseases of Cultivated Plants and Trees written by George Massee and published by . This book was released on 1952 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Smut Diseases of Cultivated Plants written by H. T. Gussow and published by Forgotten Books. This book was released on 2017-10-28 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Smut Diseases of Cultivated Plants: Their Cause and Control The farmers should insist on seeing this treatment carried out, and the thresher should be provided with a card setting forth that this treatment was carried out before leaving the farm, which card should be signed by the farmer and be demanded by the next farmer on the list, when the machine arrives on his premises. Farmers by exercising such care would greatly aid in the redue tion of smut diseases throughout important grain-growing areas. 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.
Download or read book Diseases of Cultivated Plants and Trees by George Massee written by George Massee and published by . This book was released on 1910 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Letters on the Diseases of Plants written by Nathan Augustus Cobb and published by . This book was released on 1897 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diseases of Cultivated Plants and Trees Scholar s Choice Edition written by George Massee and published by . This book was released on 2015-02-18 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Download or read book Text Book of the Diseases of Trees Classic Reprint written by Robert Hartig and published by Forgotten Books. This book was released on 2018-01-18 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Text-Book of the Diseases of Trees Some fifty years ago a number of able investigators, of whom only Saxesen, Th. Hartig, and Ratzeburg need be named here, applied themselves to the study of insects. The life-history of forest insects, their harmfulness or usefulness, soon became the favourite study of many practical foresters, and in a few decades the joint efforts of numerous workers were rewarded by the elevation of Forest Entomology to the position of a much appreciated subject of scientific instruction, which has become the common property of all educated foresters. The case was otherwise with those plant-diseases which cannot be ascribed to the injuries of animals. Their investi gation was delayed until quite recently; for it was only after botanical science, by the aid of its chief instrument, the microscope, had obtained a clear insight into the normal strue ture and vital phenomena of plants, and especially after the study of fungi had been prosecuted in the last few decades by a series of distinguished investigators, that the examination of the phenomena of disease in the life of plants could be undertaken with a prospect of success. 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.
Download or read book Diseases and Pests of Cultivated Plants Vol 6 written by J. W. Eastham and published by . This book was released on 2015-08-04 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Diseases and Pests of Cultivated Plants, Vol. 6: Sprays and Spraying The slime-moulds differ from typical fungi chiefly in the body not being formed of hyphae, but, until spore-formation, of a mass of naked protoplasm or living matter, without any containing membrane. As disease-producers they are comparatively unimportant, powdery scab of potatoes and club-root or finger-and-toe of cruciferous plants being the chief diseases due to them. Fungi reproduce by means of minute bodies termed spores, which are, in a sense, comparable to the seeds of higher plants. These spores vary greatly in shape, size, and the manner in which they are produced. They may be spherical, oblong, or thread-like; borne exposed at the tips of special hyphae, or enclosed in sacs (sporangia). Often very special fungus-structures are produced solely with the object of forming and distributing these spores. What we commonly term a "mushroom," for instance, is nothing more than a fructification or reproductive structure, the mycelium or feeding portion of the plant being in the soil - the so-called "spawn." Although spores vary much in size, they are all very minute and easily carried by the wind, rain, insects, etc. Some of the smaller may be little more than 1/25,000 inch in diameter, whilst a very large one might be a hundred times as long by ten times as broad. Often a fungus produces two or more different kinds of spores. The fungus causing apple-scab produces one kind throughout the growing season on the living plant. On the dead leaves, during the winter, a totally different kind develops, to be scattered in the spring. Hence the necessity for knowing the full life-history of the fungus causing a disease, in order to be able to trace back the different infections to their source and take adequate measures against them. Spores which are designed to reproduce the fungus at once are generally enclosed by a very delicate membrane, and usually dry up and die after a short time unless the conditions are right for germination and infection. Resting spores - e.g., for carrying a fungus over winter - are generally thick-walled and resistant to adverse conditions. The method by which a spore germinates to produce a new fungus-plant varies, but generally a delicate hypha (germ-tube) is pushed out, which, if favourably placed with regard to a suitable host-plant, will penetrate into the tissues and develop into a mycelium. A suitable temperature is necessary for this, and, in most cases, a film of moisture such as results from rainfall or dew. This explains why wet weather and moist climates are conducive to epidemics of many fungus-diseases. The whole time between the germination of the spore and the production of new spores from the mycelium so formed may be less than a week, and since the spores are often produced in enormous numbers, it is not difficult to understand the rapidity with which a disease may spread if the conditions are favourable. Bacteria. Bacteria are closely related to the fungi, of which, indeed, they are often considered a group. They differ chiefly in their exceedingly simple structure, each individual being a single minute cell. They multiply (in the case of those causing plant-diseases) by each individual dividing transversely into two, each of which goes on growing until it becomes full-sized, when the process is repeated. Many bacteria (but not those causing plant-diseases) also form spores, but these are of a different type from those of the fungi. The living matter (protoplasm) becomes aggregated together, surrounded by a resistant wall, and enters into a dormant condition. It is a device for resisting unfavourable conditions rather than a means of multiplication. The individuals which result from continued division of one or more original ones may remain together as slimy masses such as are often found on decomposing organic matter. In some cases the individuals remain end to end, forming th."
Download or read book Manual of Tree Diseases Classic Reprint written by William Howard Rankin and published by Forgotten Books. This book was released on 2018-03-08 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Manual of Tree Diseases Tm: steadily accumulating knowledge of the diseases of trees in the United States has never been brought together and made available to the general public. The intention of this Manual is to describe and suggest means of control for the tree diseases that have been most studied. Much remains to be learned about many of these diseases, and still many more have never been investigated. Therefore, in the treatment of this subject there are many unavoidable limitations which the trained reader will perceive. The diseases of fruit-trees, and of field and vegetable crops, have received the attention of plant pathologists in most parts of the country for many years. The results of these investigations have been made available to the growers of these crops in various ways. On the other hand, the diseases of forest, shade, and ornamental trees have been largely neglected until very recently. 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.
Download or read book Summary of Plant Diseases in the United States in 1918 written by Royal Joyslin Haskell and published by Forgotten Books. This book was released on 2018-03-18 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Summary of Plant Diseases in the United States in 1918: Diseases of Fiber Crops, Forest Trees, Ornamental and Miscellaneous Plants In Mississippi the damage varied from 1 or 2% to 15 and In Louisiana there was a fairly large crop injury but the loss was slight, about ld2%. In Texas about 2% of the crop was injured. In Arkansas there was only a trace of injury. 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.
Download or read book The Plant Disease Bulletin 1919 Classic Reprint written by U. S. Bureau of Plant Industry and published by Forgotten Books. This book was released on 2017-11-19 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Plant Disease Bulletin, 1919 A summary of the data obtained by the Plant Disease Survey during 1918 will be issued in parts as supplements to the Plant Disease Bulletin as follows Supplement I Diseases of fruit crops. Supplement II Diseases of field and vegetable crops. Supplement III Diseases of field and vegetable crops continued). Supplement IV Diseases of cereal and forage crops. Supplement V Diseases of fiber crops, forest trees, Ornamental and miscellaneous plants. 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.
Download or read book Minnesota Plant Diseases Classic Reprint written by Edward Monroe Freeman and published by Forgotten Books. This book was released on 2018-03-23 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Minnesota Plant Diseases Professor L. F. Kinney of the Rhode Island Agricultural Experiment Station: Mr. I. B. Ell'u of Newfield, New jersey: and Professor G. Massee of Kew Gardens, Lon don. To my wife I am greatly indebted for assistance in proof reading and in pre paring the manuscript and index. 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.
Download or read book Massee s Diseases of Cultivated Trees and Plants written by Harry Morton Fitzpatrick and published by . This book was released on 1916 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diseases of Economic Plants Classic Reprint written by Frank Lincoln Stevens and published by . This book was released on 2015-07-03 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Diseases of Economic Plants A science of Plant Disease was an impossibility until knowledge existed concerning the nature of the parasitic organisms, the fungi and bacteria. The science of Plant Diseases or of Phytopathology was in its early formative period between 1853 and 1870, the very foundations being laid in the pioneer work of Berkeley and De Bary in establishing the parasitism of the fungi, and in Pasteur's fundamental work on Bacteria and Spontaneous Generation. To be sure some of the most conspicuous diseases had long been known by sight. Blight and mildew were referred to in both the Old and the New Testament. Wheat rust was mentioned by Aristotle 350 B.C. and reference to mildew is found in King Lear, Act III, Sc. 4. There was even legislation regarding wheat rust as early as 1760. Yet there was little or no real knowledge of plant diseases in those times, beyond the fact that diseases existed. Following the pioneer publications of Berkeley and De Bary came the more complete treatises of Frank (1880, 1895), Sorauer (1874, 1886, 1906), Kirchner (1890), Tubeuf (1894), and others. It was not until 1873 that plant pathology became a part of instruction in botany, and not until 1875 that special courses in pathology were given in any of the schools of America. 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.
Download or read book Text Book of the Diseases of Trees written by Professor R. Hartig and published by Forgotten Books. This book was released on 2015-06-25 with total page 349 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Text-Book of the Diseases of Trees The foundation of a science of Mycology by Berkeley, de Bary, and Tulasne, pursued by Brefeld, Zopf, and others, has led to a knowledge of the biology of fungi highly creditable to the industrious observers who have explored this domain of the vegetable kingdom; while the gradual building up of the science of plant-physiology from the days of Knight and Hales, De Saussure and Boussingault, to those of Sachs and Pfeffer, has placed us in possession of a vast amount of information as regards normal life processes in plants. Until much more recently, however, it cannot be said that we have had a science of the pathology of plants - i.e. the study of abnormal physiology - of anything like the same importance, in spite of the splendid and progressive attempts of Berkeley, Frank, and Sorauer to found one. In the particular department he has cultivated, Robert Hartig has succeeded in founding a plant-pathology really worthy of the name, and I would especially emphasize this, that his researches are so thoroughly elucidative of pathological phenomena, in that he studies not only the nature of the structural lesions and of the physiological disturbances consequent on these, but also the factors of the environment which throw light on the question. 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.
