Author: Alex L. ShigoPublisher:
ISBN:
Category : Trees
Languages : en
Pages : 16
Book Description
Detection of Discoloration and Decay in Living Trees and Utility Poles
Author: Alex L. ShigoA Photo Guide to the Patterns of Discoloration and Decay in Living Northern Hardwood Trees
Author: Alex L. ShigoPublisher:
ISBN:
Category : Hardwoods
Languages : en
Pages : 112
Book Description
S2This guide has been prepared to help you estimate the extent and severity of discoloration and decay in northern hardwood trees. Though this certainly is not the last word on the subject, our research in this has progressed to the point where our findings, combined with the findings of others, can be put to practical use. By dissecting living trees and studying the organisms that infect them, we now know that discoloration and decay develop in certain definite patterns. And the patterns of discoloration and decay within the tree can be predicted from external signs. Discoloration and decay are the most serious defects of northern hardwood trees. In speaking of defect, we must distinguish between injury and damage. Injury harms the tree: damage lowers the quality of the wood. For example, a disease like vascular wilt may kill the tree but do no damage to the wood. But an insect like the cambium miner may do very little harm to the tree yet do great damage to the wood. The unseen damage done to a tree is important in the economics of forestry. Every operation in growing a tree, harvesting it, and converting it into products costs time and money. And after all the time and money have been spent on a tree, the product made from it may prove to be not worth the effort; and the tree might have been used more profitably for some other product that does not require high-quality wood. The increased use of veneer offers an illustration. A veneer log brings top prices. But its actual value may not become apparent till it is put on a lathe and peeled. A log that looks very good and sound to the core, may have minute streaks of discoloration scattered all through it, so that all the veneer it produces is badly streaked with defects. On the other hand, a log that has a rotten core surrounded by clear wood may produce the highest quality of veneer. So it is not so important how much discoloration and decay a tree has, but when these defects are in a tree. The pattern of the discoloration and decay- that's the important thing.S3.
Detection of active decay at groundline in utility poles
Author: Alex L. ShigoField and Laboratory Guide to Tree Pathology
Author: Robert O. BlanchardPublisher: Elsevier
ISBN: 1483288196
Category : Science
Languages : en
Pages : 389
Book Description
The Second Edition of this classic text is completely up-to-date with new chapters, new information on diseases, updated citations, and revised taxonomy and terminology of the fungi, bacteria, and other organisms that affect trees. Field and Laboratory Guide to Tree Pathology presents field and laboratory techniques as well as basic information for students, foresters, plant scientists, and arboriculturalists on tree disease pathology. The revised edition includes expanded historical documentation, updated taxonomy and terminology for both pests and diseases, an entirely new introduction, new chapters on tree biology, general control strategies, and diagnostic techniques. A new section of color plates will help readers in the identification of tree pathogens. All the references have been comprehensively updated, and the exercises included for students have been revised, making this guide a useful tool for students, teachers, and practitioners interested in tree disease. Contains new chapters on tree biology, general control strategies, and diagnostic techniques Includes additional information on the histories of disease Provides thoroughly updated citations Contains comprehensively revised taxonomy and terminology
USDA Forest Service Research Paper NE.
Author: Northeastern Forest Experiment Station (Radnor, Pa.)Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 298
Book Description
Wood Bridges
Author: Wallace E. EslynPublisher:
ISBN:
Category : Wood
Languages : en
Pages : 42
Book Description
Conservation of Wood Artifacts
Author: A. UngerPublisher: Springer Science & Business Media
ISBN: 3662063980
Category : Science
Languages : en
Pages : 608
Book Description
The impetus for this book was the desire to systematically organize the extant literature on the conservation of cultural property made of wood, from its beginnings before the Christian Era to the year 2000. Various published reviews and monographs, including Holzkonservierung (Wood Conserva tion) published by the senior author in 1988, have appeared over the years, especially in English and in German. They have provided exemplary treat merit of individual areas or aspects of wood conservation, but a comprehen sive, up-to-date exposition of historic and current developments has been lacking. The diverse professional fields of the authors, as well as their insights into methods of conservation and restoration of wood artifacts in Europe, North America, and Asia provided a solid basis for the success of this under taking. One of the goals during the examination of the literature was that not only well-known conservators and scientists from countries that are leaders in wood conservation should be represented, but that less well-known, often not as readily accessible contributions should also be included. Only in this manner was it possible to draw a comprehensive picture of the national and international state of wood conservation. The Art and Archaeology Technical Abstracts (AATA) of the Getty Institute were very helpful in our efforts to evaluate as many publications as possible.
Research Paper NE
Author: Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 452
Book Description
Sapstreak Disease of Sugar Maple
Author: David R. HoustonPublisher:
ISBN:
Category : Fungal diseases of plants
Languages : en
Pages : 28
Book Description
Sapstreak disease is a potentially serious problem of sugarbushes and forest stands. It is caused by the fungus Ceratocystis virescens, which invades sapwood of roots and bases of stems through wounds created during logging, saphauling, or other activities. This report describes the results of observations and experiments to learn more about the patterns of disease development and the factors that affect them, within individual trees and within representative forests and sugarbushes.
West Virginia Yellow-poplar Lumber Defect Database
Author: Lawrence E. OsbornPublisher:
ISBN:
Category : Liriodendron tulipifera
Languages : en
Pages : 688
Book Description
S2In West Virginia, yellow-poplar (Liriodendron tulipifera) is abundant and is a prime candidate for increased utilization in a variety of manufacturing industries. Computer simulations are a cost-effective tool for estimating potential cutting yields from lumber. They can be used to promote increased use of yellow-poplar in the furniture, cabinet, and architectural woodworking industries and may also lead to increased utilization of the lower grades of lumber. This paper describes the data collection methods and the format of the new West Virginia yellow-poplar lumber defect database that was developed for use with computer simulation programs. The database contains descriptions of 627 boards, totaling approximately 3,800 board feet, collected in West Virginia for grades FAS, FASIF, No. 1 Common, No. 2A Common, and No. 28 Common.S3.