Tree Mycoplasmas and Mycoplasma Diseases

Author: Chuji Hiruki
Publisher: University of Alberta
ISBN: 9780888641267
Format: PDF, Mobi
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Mycoplasma are the smallest free-living prokaryotes lacking a cell wall and are, therefore, highly pleomorphic. This book is a contribution toward an understanding of the complex problems of tree diseases caused by mycoplasma-like organisms and their relatives.

Mycoplasma Diseases of Trees and Shrubs

Author: Karl Maramorosch
Publisher: Elsevier
ISBN: 0323153569
Format: PDF, Kindle
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Mycoplasma Diseases of Trees and Shrubs contains the edited papers presented at the Third Working Party meeting organized by Professor Karl Maramorosch at Rutgers University, New Jersey, in August 1979. This book also includes additional chapters by the invited contributors in the meeting. Organized into 15 chapters, this book begins with the isolation, characterization and identification of spiroplasmas and mycoplasma-like organisms. It then describes the various diseases of trees and shrubs, specifically yellows disease, stubborn disease, Paulownia witches' broom disease, mulberry dwarf, blueberry stunt, and sandal spike disease. It also elaborates the control of tree diseases by chemotherapy. This treatise will provide a standard reference work for all interested in plant mycoplasma diseases in forest pathology, entomology, and disease control.

Diseases of Shade Trees

Author: Terry A. Tattar
Publisher: Academic Press
ISBN: 1483269043
Format: PDF, Kindle
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Diseases of Shade Trees provides an introduction to tree diseases for students and others concerned with the care of shade and ornamental trees. Diseases of woody plants fall into two major categories: infectious diseases and noninfectious diseases. Part I of the book presents the infectious pathogens and the diseases they cause. These include bacteria, mycoplasmas, nematodes, seed plants, and viruses. The nature of the fungi is also presented, with separate chapters for leaf, root, rust, stem, and wilt diseases caused by fungi. Wound diseases, which are associated with both fungi and bacteria that invade wounds, are included in this section. Part II deals with noninfectious agents and the diseases they cause. Noninfectious agents are separated into environmental stress, animal injury, and people-pressure diseases. Diebacks and declines—complex diseases, which are often caused by a combination of both infectious and noninfectious agents are also included in this section. Part III on special topics includes discussions of nonpathogenic conditions often mistaken for diseases; diagnosis of tree diseases; and living hazard trees.

Electron Microscopy of Plant Pathogens

Author: Kurt Mendgen
Publisher: Springer Science & Business Media
ISBN: 3642758185
Format: PDF, ePub
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Plants, fungi, and viruses were among the first biological objects studied with an electron microscope. One of the two first instruments built by Siemens was used by Helmut Ruska, a brother of Ernst Ruska, the pioneer in constructing electron microscopes. H. Ruska published numerous papers on different biological objects in 1939. In one of these, the pictures by G. A. Kausche, E. Pfankuch, and H. Ruska of tobacco mosaic virus opened a new age in microscopy. The main problem was then as it still is today, to obtain an appropriate preparation of the specimen for observation in the electron microscope. Beam damage and specimen thickness were the first obstacles to be met. L. Marton in Brussels not only built his own instrument, but also made considerable progress in specimen preparation by introducing the impregnation of samples with heavy metals to obtain useful contrast. His pictures of the bird nest orchid root impregnated with osmium were revolutionary when published in 1934. It is not the place here to recall the different techniques which were developed in the subsequent years to attain the modern knowledge on the fine structure of plant cells and of different plant pathogens. The tremendous progress obtained with tobacco mosaic virus is reflected in the chapter by M. Wurtz on the fine structure of viruses in this Volume. New cytochemical and immunological techniques considerably surpass the morphological information obtained from the pathogens, especially at the host-parasite interface.

Forest Entomology

Author: William Ciesla
Publisher: John Wiley & Sons
ISBN: 1444397885
Format: PDF, Kindle
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Insects are the most abundant and diverse organisms that inhabit our planet and are found in all the world’s forest ecosystems. Many feed and/or breed on parts of trees. Some perform important functions, such as pollination or break-down of dead vegetation. Others weaken, deform or kill trees, and compete with humans for the many goods and services that trees and forests provide. Forest Entomology: A Global Perspective examines forest insects in a global context and reviews their dynamics, interactions with humans and methods for monitoring and management of species that damage forests. Also provided are 235 profiles of forest insects, worldwide. A series of tables provides summaries of the distribution and hosts of many more species. Included are those that damage forests, others that are simply curiosities and some that are beneficial. This book is designed as a reference for students, practicing foresters and forest health specialists, especially for those who work internationally or are concerned with species that have the potential to expand their ranges via international trade, travel or environmental changes.