Download or read book Dynamics of Forest Insect Populations written by Alan A. Berryman and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: Insects multiply. Destruction reigns. There is dismay, followed by outcry, and demands to Authority. Authority remembers its experts or appoints some: they ought to know. The experts advise a Cure. The Cure can be almost anything: holy water from Mecca, a Government Commis sion, a culture of bacteria, poison, prayers denunciatory or tactful, a new god, a trap, a Pied Piper. The Cures have only one thing in common: with a little patience they always work. They have never been known entirely to fail. Likewise they have never been known to prevent the next outbreak. For the cycle of abundance and scarcity has a rhythm of its own, and the Cures are applied just when the plague of insects is going to abate through its own loss of momentum. -Abridged, with insects in place of voles, from C. Elton, 1924, Voles, Mice and Lemmings, with permission of Oxford University Press This book is an enquiry into the "natural rhythms" of insect abundance in forested ecosystems and into the forces that give rise to these rhythms. Forests form unique environ ments for such studies because one can find them growing under relatively natural (pri meval) conditions as well as under the domination of human actions. Also, the slow growth and turnover rates of forested ecosystems enable us to investigate insect popula tion dynamics in a plant environment that remains relatively constant or changes only slowly, this in contrast to agricultural systems, where change is often drastic and frequent.
Download or read book General Technical Report WO written by and published by . This book was released on 1975 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Forest Insects written by Alan A. Berryman and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is intended as a general text for undergraduates studying the manage ment of forest insect pests. It is divided into four parts: insects, ecology, manage ment, and practice. Part I, Insects, contains two chapters. The first is intended to provide an overview of the general attributes of insects. Recognizing that it is impossible to adequately treat such a diverse and complex group of organisms in such a short space, I have attempted to highlight those insectan characteristics that make them difficult animals to combat. I have also tried to expose the insects' weak points, those attributes that make them vulnerable to manipulation by human actions. Even so, this first chapter will seem inadequate and sketchy to many of my colleagues. Ideally, this book should be used in conjunction with a laboratory manual covering insect anatomy, physiology, biology, behavior, and classifica tion in much greater depth-in fact, this is how I organize my forest entomology course. It is hoped that this first chapter will provide nonentomologists with a general feel for the insects and with a broad understanding of their strengths and weaknesses, while Chapter 2 will provide a brief overview of the diverse insect fauna that attacks the various parts of forest trees and their products.
Download or read book White Pine Blister Rust in Northern Idaho and Western Montana written by David N. Cole and published by . This book was released on 1989 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coniferous forest habitat types of northern Utah written by Ronald L. Mauk and published by . This book was released on 1984 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book General Technical Report INT written by and published by . This book was released on 1984 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Integrating Management Strategies for the Mountain Pine Beetle with Multiple resource Management of Lodgepole Pine Forests written by and published by . This book was released on 1985 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications of the Pacific Northwest Forest and Range Experiment Station written by Pacific Northwest Forest and Range Experiment Station (Portland, Or.) and published by . This book was released on 1985 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of a Workshop on Bark Beetle Genetics Current Status of Research July 17 18 1998 Madison Wisconsin written by and published by . This book was released on 1999 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings contains contributions from each author or group of authors who presented their current research at the bark beetle genetics workshop held 17-18 July 1998 on the campus of the University of Wisconsin in Madison, Wisconsin, USA. This was the second meeting on this subject; the first was held in 1992. The subject of bark beetle genetics is of growing, international interest; researchers from Austria, Hungary, and Mexico, as well as from across the United States have contributed to this proceedings. The topics covered included molecular approaches to genetic analysis of bark beetles, genetic structure of bark beetle populations, variability in ecologically important traits: effects on beetle fitness, and systematics of bark beetles.
Download or read book Publications of the Pacific Northwest Research Station written by Pacific Northwest Research Station (Portland, Or.) and published by . This book was released on 1985 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Making Our Forests and Rangelands More Productive written by and published by . This book was released on 1986 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recent Reports written by and published by . This book was released on 1985 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book General Technical Report PNW GTR written by and published by . This book was released on 1999 with total page 990 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Timber Harvesting Processing and Employment in the Northwest Economic Adjustment Initiative Region written by Terry L. Raettig and published by . This book was released on 1999 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanisms and Deployment of Resistance in Trees to Insects written by Michael R. Wagner and published by Springer Science & Business Media. This book was released on 2007-05-08 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanisms and Deployment of Resistance in Trees to Insects is a worldwide synthesis of tree resistance to insects. The contributions are by senior scientists and represent all the major forested regions of the world. The book constitutes a comprehensive treatment of the state of our knowledge on patterns of resistance by insect guilds and how this knowledge can be deployed to achieve the management of damaging forest insects. This book will serve as an essential reference book for all researchers and practitioners attempting to manage forest pests using genetic resistance.
Download or read book Proceedings Symposium on the Management of Lodgepole Pine to Minimize Losses to the Mountain Pine Beetle Kalispell MT July 12 14 1988 written by and published by . This book was released on 1989 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Population Dynamics of the Major North American Needle eating Budworms written by Robert W. Campbell and published by . This book was released on 1993 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
