Common Names Of Diseases Of Woody Plants Classic Reprint

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Common Names of Diseases of Woody Plants (Classic Reprint)

Author : F. P. Hubert
Publisher : Forgotten Books
ISBN 13 : 9781396143717
Total Pages : 38 pages
Book Rating : 4.1/5 (437 download)

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Book Synopsis Common Names of Diseases of Woody Plants (Classic Reprint) by : F. P. Hubert

Download or read book Common Names of Diseases of Woody Plants (Classic Reprint) written by F. P. Hubert and published by Forgotten Books. This book was released on 2018-09-11 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Common Names of Diseases of Woody Plants In this list of plant diseases the geographical area is limited to the United States, Alaska, Hawaii, Panama Canal Zone, and Puerto Rico. Only diseases of woody plants of economic importance are included. Although an exhaustive search has been made to locate all Such common names, no doubt some omissions have been made. Leaf Spot diseases, in general, have not been included, because of their large number and often secondary or indefinite nature. 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.

Common Names of Diseases of Woody Plants

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (944 download)

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Book Synopsis Common Names of Diseases of Woody Plants by :

Download or read book Common Names of Diseases of Woody Plants written by and published by . This book was released on 1951 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Common Names of Diseases of Woody Plants

Author : F. P. Hubert
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (66 download)

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Book Synopsis Common Names of Diseases of Woody Plants by : F. P. Hubert

Download or read book Common Names of Diseases of Woody Plants written by F. P. Hubert and published by . This book was released on 1951 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Diseases of Woody Ornamentals and Trees in Nurseries

Author : Ronald Klair Jones
Publisher : American Phytopathological Society
ISBN 13 :
Total Pages : 522 pages
Book Rating : 4.:/5 (89 download)

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Book Synopsis Diseases of Woody Ornamentals and Trees in Nurseries by : Ronald Klair Jones

Download or read book Diseases of Woody Ornamentals and Trees in Nurseries written by Ronald Klair Jones and published by American Phytopathological Society. This book was released on 2001 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extension agents from around the country offer practical, informative articles addressing the diseases of crops grown in nurseries. Some introductory pieces address abiotic and biotic causes of disease and eleven general diseases such as Botrytis blight and Verticillium wilt. The diseases to which 64 shade trees, shrubs, ground covers, and subtropical ornamentals are susceptible are then discussed in detail, along with methods for the diseases' control. The remaining 17 articles address aspects of disease management, from an introduction to the management of infectious plant diseases in the nursery to tissue culture of woody plants and regulatory control issues. c. Book News Inc.

Text-Book of the Diseases of Trees (Classic Reprint)

Author : Robert Hartig
Publisher : Forgotten Books
ISBN 13 : 9780483376472
Total Pages : 354 pages
Book Rating : 4.3/5 (764 download)

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Book Synopsis Text-Book of the Diseases of Trees (Classic Reprint) by : Robert Hartig

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.

Diseases of Woody Ornamentals and Trees

Author : American Phytopathological Society
Publisher : Amer Phytopathological Society
ISBN 13 : 9780890543078
Total Pages : pages
Book Rating : 4.5/5 (43 download)

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Book Synopsis Diseases of Woody Ornamentals and Trees by : American Phytopathological Society

Download or read book Diseases of Woody Ornamentals and Trees written by American Phytopathological Society and published by Amer Phytopathological Society. This book was released on 2003-01-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This powerful teaching tool and disease reference CD-Rom is compilation of 716 woody ornamental and shade tree disease images including conifer species such as pine, spruce, fir and hemlock; elm, rhododendron, azalea, rose, even ornamental palms.Search for images by both common and botanical host names, pathogen, disease name, and key word to discover images of problems caused by fungi, bacteria, viruses, phytoplasmas, nematodes, physiological disorders, nutrient deficiencies, herbicide injuries, and insect damage.Disease images may be magnified, printed, and exported for use in presentation software such as PowerPoint, or use the built-in slide-show feature to create an instant lecture using specific images related to your talk.For Educational Use: create a strong visual impact in projects and presentations develop personalized slide shows for lectures and seminars create study guides and reference material that appeals to visually oriented students teach students to identify and diagnose diseases for more accurate control recommendationsFor Corporate Use: train staff in disease recognition improve productivity by providing visual examples of diseases.Images are available for commercial use. Contact customer service for more information.

The Diseases of Tropical Plants (Classic Reprint)

Author : Melville Thurston Cook
Publisher :
ISBN 13 : 9781330611913
Total Pages : 340 pages
Book Rating : 4.6/5 (119 download)

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Book Synopsis The Diseases of Tropical Plants (Classic Reprint) by : Melville Thurston Cook

Download or read book The Diseases of Tropical Plants (Classic Reprint) written by Melville Thurston Cook and published by . This book was released on 2015-09-27 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Diseases of Tropical Plants The very rapid development of plant pathology during the past few years and the increasing interest in tropical agriculture have led the writer to prepare this introductory work on the Diseases of Tropical Plants. An extensive study of the fungi, bacteria, and other organisms which cause the diseases of plants was a necessary preliminary to the development of plant pathology, and the progress in this subject has been much more rapid in the north temperate zone than in the tropics. In the past few years, however, there has been a great awakening of interest in these studies throughout both the eastern and western tropics. Nevertheless, the literature is scattered, frequently indefinite in character, and presents an abundance of difficulties to the student at the present time. While gathering material for this book, one correspondent wrote that the time had not yet come when it was possible for any one to write a work on the diseases of tropical plants. The writer is now ready to agree with this gentleman, and to add that it is doubtful if the time will ever come when any one author can adequately treat of the tropics of the entire world and their plant diseases. 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.

Diseases of Forest and Shade Trees, Ornamental and Miscellaneous Plants in the United States in 1925

Author : G. Hamilton Martin
Publisher : Forgotten Books
ISBN 13 : 9781396206467
Total Pages : 74 pages
Book Rating : 4.2/5 (64 download)

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Book Synopsis Diseases of Forest and Shade Trees, Ornamental and Miscellaneous Plants in the United States in 1925 by : G. Hamilton Martin

Download or read book Diseases of Forest and Shade Trees, Ornamental and Miscellaneous Plants in the United States in 1925 written by G. Hamilton Martin and published by Forgotten Books. This book was released on 2018-09-13 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Diseases of Forest and Shade Trees, Ornamental and Miscellaneous Plants in the United States in 1925: December 1, 1926 List of collaborators of the Plant Disease Survey who have made the principal contribution to this section of the 1925 annual summary on plant diseases. 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.

A Report on Plant Diseases of the State (Classic Reprint)

Author : John L. Sheldon
Publisher : Forgotten Books
ISBN 13 : 9780666019158
Total Pages : 38 pages
Book Rating : 4.0/5 (191 download)

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Book Synopsis A Report on Plant Diseases of the State (Classic Reprint) by : John L. Sheldon

Download or read book A Report on Plant Diseases of the State (Classic Reprint) written by John L. Sheldon and published by Forgotten Books. This book was released on 2018-02-20 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from A Report on Plant Diseases of the State Black Rot. This is another destructive disease, causing the fruit to rot and cankers on the branches. The young growth is some times killed, the twigs then resembling those attacked by the twig blight, for which it may be mistaken. The disease was found on apple leaves at Wellsburg. The black rot is similar to the bitter rot in general appearance, except that instead of the masses of pinkish spores that break through the Skin in the case of bitter rot, there are small black bodies imbedded under the skin in the case of'black rot. The shrunken and Shriveled apples often remain on the trees for a year or more. This disease has been Very destructive to quinces in several parts of the State. At a number of places where it was found on quinces, it was also found on apples near by. The same treatment is recommended as for bitter rot. It is possible that the black rot' might be controlled to some extent when it is found on quinces by picking the rotting fruit before the Spores have developed and become distributed. On apples this might not be feasible on account of the size of the trees. Canker. The cankers are the dead and shrunken areas occasionally found on the branches and trunk. They are due to a number of causes. (see under Bitter Rot and Black Rot.) One of the common ones found in old orchards is known as the Illinois Canker. It may be recognized by the black round bodies that push through the dead bark on the branches and trunk. These bodies are sometimes nearly one-fourth of an inch in diameter, and attached to the wood, so that when they are broken off, a black ring remains. Keeping the cankers and dead branches cut out should prove effective. Crown Gall. This has been reported as occurring on nursery stock shipped into the State. Several specimens of the disease have been received at the Experiment Station. It would be well to burn all infected stock, such as apple, pear, peach, cherry, raspberry and blackberry, that have hard, irregular, rough swellings on the crowns or roots, in order to prevent the introduction of the disease. The swellings or galls are sometimes covered with a large number of roots. A similar disease is produced by an insect called the woolly aphis. 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 Fungi Which Cause Plant Disease (Classic Reprint)

Author : Frank Lincoln Stevens
Publisher : Forgotten Books
ISBN 13 : 9780656713653
Total Pages : 778 pages
Book Rating : 4.7/5 (136 download)

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Book Synopsis The Fungi Which Cause Plant Disease (Classic Reprint) by : Frank Lincoln Stevens

Download or read book The Fungi Which Cause Plant Disease (Classic Reprint) written by Frank Lincoln Stevens and published by Forgotten Books. This book was released on 2018-02-16 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Fungi Which Cause Plant Disease Diseases of Economic Plants. Effort has been made to avoid duplication of matter contained in that volume. Abundant citations to the more important papers are given, sufficient, it is believed, to put the student in touch with the literature of the subject. While many parasites not yet known in the United States are brieﬂy mentioned, especially the more important ones or those which are likely to invade America, no attempt has been made to list all of these. N on - parasitic groups closely related to those that are parasitic have been introduced in the keys merely to give a larger perspective to the student. Effort has been made to give at least one illustration of each genus that is of importance in the United States. 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.

Plant Disease Fungi (Classic Reprint)

Author : Frank Lincoln Stevens
Publisher : Forgotten Books
ISBN 13 : 9780428703585
Total Pages : 480 pages
Book Rating : 4.7/5 (35 download)

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Book Synopsis Plant Disease Fungi (Classic Reprint) by : Frank Lincoln Stevens

Download or read book Plant Disease Fungi (Classic Reprint) written by Frank Lincoln Stevens and published by Forgotten Books. This book was released on 2018-01-10 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Plant Disease Fungi A large percentage of all plant diseases is caused by fungi. Fungi are devoid of chlorophyll and while transpiration, respira tion, and true assimilation are the same as with the green plants, photosynthesis or starch manufacture cannot be accomplished by them. Sunlight being thus unnecessary they can live in the dark as well as the light. Having no ability to elaborate their own foods from inorganic matter these organisms are limited to such nutriment as they can obtain from plants or animals which have elaborated it; that is, they must have organic foods for their sustenance. 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.

List of Common Names of British Plant Diseases. (Compiled by the Plant Pathology Sub-Committee of the British Mycological Society.) Reprinted from the Transactions of the ... Society, etc

Download List of Common Names of British Plant Diseases. (Compiled by the Plant Pathology Sub-Committee of the British Mycological Society.) Reprinted from the Transactions of the ... Society, etc PDF Online Free

Author : British Mycological Society
Publisher :
ISBN 13 :
Total Pages : 75 pages
Book Rating : 4.:/5 (559 download)

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Book Synopsis List of Common Names of British Plant Diseases. (Compiled by the Plant Pathology Sub-Committee of the British Mycological Society.) Reprinted from the Transactions of the ... Society, etc by : British Mycological Society

Download or read book List of Common Names of British Plant Diseases. (Compiled by the Plant Pathology Sub-Committee of the British Mycological Society.) Reprinted from the Transactions of the ... Society, etc written by British Mycological Society and published by . This book was released on 1929 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Standardization of Common Names of Plant Diseases

Author : Gordon Herriot Cunningham
Publisher :
ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (797 download)

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Book Synopsis Standardization of Common Names of Plant Diseases by : Gordon Herriot Cunningham

Download or read book Standardization of Common Names of Plant Diseases written by Gordon Herriot Cunningham and published by . This book was released on 1931 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Minnesota Plant Diseases (Classic Reprint)

Author : Edward Monroe Freeman
Publisher :
ISBN 13 : 9781330624050
Total Pages : 458 pages
Book Rating : 4.6/5 (24 download)

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Book Synopsis Minnesota Plant Diseases (Classic Reprint) by : Edward Monroe Freeman

Download or read book Minnesota Plant Diseases (Classic Reprint) written by Edward Monroe Freeman and published by . This book was released on 2015-09-27 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Minnesota Plant Diseases It is probably safe to say that millions of dollars are lost in Minnesota yearly by the ravages of plant diseases. Agriculturists and horticulturists all over the world have of late years directed a great deal of attention toward the study of plant diseases and the methods of combating them. The Department of Agriculture of the United States has done vastly more than any other institution in the world along this line and the results have been well worth the efforts, for many efficient methods of fighting these pests have been devised. In many cases where cure is impossible an intelligent understanding of the conditions and effects of a disease will aid in prevention. The dissemination of such knowledge is of very great value. It is a very evident fact that all agricultural pursuits are taking great strides, and the education of those boys and girls who are about to cultivate or manage the cultivation of lands is becoming more and more imperative. The possession of an accurate knowledge of plant diseases and their causes is not only of commercial use to the farmer, both in cure and prevention, but also, by making him an intelligent observer, adds hosts of assistants to the small corps of men who are devoting their time to this study of botanical science. The advantages of such a condition amongst agriculturists would far surpass those where the mere knowledge of present methods of prevention and cure obtains. In fact it is only with the intelligent and hearty co operation of farmers that such work can successfully go forward. It is not the aim of this work therefore to catalogue all of the ills that Minnesota plants are heir to, but its chkf object is to disseminate knowledge of the destructive parasites of the useful plants of this state, to assist all concerned in the cultivation of plants to a more intelligent and thorough understanding of the habits of these parasites, and to point out established methods of combating such diseases. Kecipes are not the aim of such a work-- these are of value and as such are introduced; but by far the most valuable effort should be the inculcation of the knowledge of the habits and life-stories of those organisms which are the causes of disease. Upon such knowledge, widely disseminated, can be built a substantial system of disease prevention. In short, the aim of this work is rather educational than immediately practical, for in the former feature the author hopes that it will be ultimately most useful. 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.

New Or Unusual Plant Injuries and Diseases Found in Connecticut, 1916-1919 (Classic Reprint)

Author : George P. Clinton
Publisher : Forgotten Books
ISBN 13 : 9780267522453
Total Pages : 116 pages
Book Rating : 4.5/5 (224 download)

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Book Synopsis New Or Unusual Plant Injuries and Diseases Found in Connecticut, 1916-1919 (Classic Reprint) by : George P. Clinton

Download or read book New Or Unusual Plant Injuries and Diseases Found in Connecticut, 1916-1919 (Classic Reprint) written by George P. Clinton and published by Forgotten Books. This book was released on 2018-02 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from New or Unusual Plant Injuries and Diseases Found in Connecticut, 1916-1919 Before proceeding to a specific account Of these various troubles, we wish to brieﬂy discuss here two that do not come strictly under the designation Of plant diseases, Since while of a fungous nature their injurious activities were directed to the destruction of household timbers in one case, and household butter in the other. 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.

Field Guide for the Identification of Damage on Woody Sentinel Plants

Author : Alain Roques
Publisher : Cabi
ISBN 13 : 9781786394415
Total Pages : pages
Book Rating : 4.3/5 (944 download)

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Book Synopsis Field Guide for the Identification of Damage on Woody Sentinel Plants by : Alain Roques

Download or read book Field Guide for the Identification of Damage on Woody Sentinel Plants written by Alain Roques and published by Cabi. This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Diseases of Trees and Shrubs

Author : Wayne A. Sinclair
Publisher : Ithaca, N.Y. : Comstock Pub. Associates
ISBN 13 :
Total Pages : 584 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Diseases of Trees and Shrubs by : Wayne A. Sinclair

Download or read book Diseases of Trees and Shrubs written by Wayne A. Sinclair and published by Ithaca, N.Y. : Comstock Pub. Associates. This book was released on 1987 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diseases of Trees and Shrubs is a comprehensive pictorial survey of the diseases of, as well as the environmental damage to, forest and shade trees and woody ornamental plants in the United States and Canada. An authoritative reference, it is also a reliable and handy diagnostic tool that will simplify the identification of specific plant diseases by focusing on signs and symptoms that can be seen with the unaided eye or with a hand lens. This long-needed book gives readers complete, up-to-date information in an easily understood and convenient way. Each of the 247 color plates faces a page of explanatory text covering the biology and ecology (including host and geographic ranges) of the disease-causing agents (pathogens), a list of key references (there are more than 2,250), and, in some cases, black-and-white illustrations of pathogens. Selected information about biological and cultural control is provided. Scientific terms other than Latin names of pathogens are used only when necessary, and a glossary of terms and a comprehensive index are included. The color plates contain more than 1,700 illustrations of the diseases and injuries that some 350 biological agents and environmental factors cause to more than 250 species of plants. The book also serves as a guide to hundreds of other diseases related to those shown. The authors have used three levels of organization for this book. At the first level, diseases caused by biological agents are separated from those caused by environmental stimuli. At the second level, most diseases are grouped according to the plant part affected: leaves, twigs, limbs, roots, trunks, or the entire plant. At the third level, diseases are presented according to the taxonomic relationships among the pathogens. For this major project, the authors examined and photographed diseases and environmental damage in the field, visiting more than 50 states and Canadian provinces. Their book reflects the most important developments in fungal biology and taxonomy, plant bacteriology, virology, and environmentally induced stress in plants. It summarizes information about newly discovered diseases and provides up-to-date accounts of olds ones. Diseases of Trees and Shrubs can be profitable reading for anyone whose technical training does not extend beyond general biology, yet will also be informative to advanced students and plant pathologists. It will be welcomed by agricultural and horticultural advisers, plant inspectors, arborists, nursery professionals, landscapers, foresters, and urban planners. Wayne A. Sinclair is a Professor of Plant Pathology, Howard H. Lyon is Biological Photographer (retired), Department of Plant Pathology, and Warren T. Johnson is Professor of Entomology, all at Cornell University.