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Author : Waldemar Klassen,J. F. Creech,R. A. Bell (entomologist)
Publisher : Unknown
Page : 80 pages
File Size : 45,8 Mb
Release : 1970
Category : Agriculture
ISBN : UVA:X030451311
Author : Ellen Kay Miller
Publisher : Unknown
Page : 122 pages
File Size : 50,7 Mb
Release : 1992
Category : Agriculture
ISBN : UCR:31210022187007
Author : Anonim
Publisher : Unknown
Page : 212 pages
File Size : 43,9 Mb
Release : 1970
Category : Swine
ISBN : STANFORD:36105113795129
Author : E. F. Knipling,W. Klassen,Waldemar Klassen
Publisher : Unknown
Page : 422 pages
File Size : 44,7 Mb
Release : 1976
Category : Genetics
ISBN : STANFORD:36105113775659
Author : United States. Dept. of Agriculture
Publisher : Unknown
Page : 200 pages
File Size : 55,5 Mb
Release : 1973
Category : Agriculture
ISBN : UIUC:30112100650768
Author : United States. Department of Agriculture
Publisher : Unknown
Page : 196 pages
File Size : 41,9 Mb
Release : 1973
Category : Agriculture
ISBN : UCBK:C006660523
Author : Ellen Kay Miller
Publisher : Unknown
Page : 118 pages
File Size : 49,7 Mb
Release : 1992
Category : Agriculture
ISBN : UCD:31175016501994
Author : Waldemar Klassen
Publisher : Unknown
Page : 8 pages
File Size : 47,5 Mb
Release : 1971
Category : Insect pests
ISBN : UVA:X030451314
To evaluate the use of sterile male insects for suppression of a pest population, one must know the magnitude of the release ratio and the level of male sterility required to eradicate the target population. The magnitude of these variables depends on the rate of increase of the pest population. The interrelationships between the release ratio, the level of sterility, and the rate of increase are quantitatively illustrated.
Author : Anonim
Publisher : Unknown
Page : 200 pages
File Size : 45,5 Mb
Release : 1976
Category : Government publications
ISBN : STANFORD:36105130626075
Author : Anonim
Publisher : Unknown
Page : 1388 pages
File Size : 52,8 Mb
Release : 1971
Category : Government publications
ISBN : OSU:32437010622500
Author : Maurice J. Tauber,Catherine A. Tauber,Shinzō Masaki
Publisher : Oxford University Press, USA
Page : 430 pages
File Size : 55,7 Mb
Release : 1986
Category : Adaptation (Biology)
ISBN : 9780195036350
This balanced comprehensive account traces the alterations in body form undergone by insects as they adapt to seasonal change, exploring both theoretical aspects and practical issues. Topics explored include natural history, genetics, evolution, and management of insect adaptations.
Author : R. F. Denno,H. Dingle
Publisher : Springer Science & Business Media
Page : 228 pages
File Size : 53,9 Mb
Release : 2012-12-06
Category : Science
ISBN : 9781461259411
This volume results from a symposium entitled "Species and Ufe History Patterns: Geographic and Habitat Variation", held during the National Meeting of the Entomo logical Society of America in Denver, Colorado, USA in November, 1979. The stimu lus to assemble papers on this theme emerged from continuing discussions with col leagues concerning controversies in ecology and evolutionary biology, namely those associated with plant-herbivore interactions, life history theory, and the equilibrium status of communities. The study organisms used in this series of reports are all either herbivorous insects or those intimately associated with plants. In this volume we stress the variation found in life history traits and address some of the problems inherent in current life history theory. We include as life history traits not only traditional variables such as fecundity, size of young, and age to first and peak reproduction, but also diapause and migration, traits that synchronize reproduction with favorable plant resources. Because life history traits of phytophagous insects are influenced in part by spatial and temporal variation in the quality and availability of their host plants, we also consider the role that dis continuities in plant quality play in reducing insect fitness. Lastly, much of the tra ditional life history theory concerns itself with differences between the evolution of traits or constellations of traits when populations incur primarily density-independent, compared to density-dependent, mortality. Consequently, we address this issue and attempt to shed light on the equilibrium status of several phytophagous insect com munities.
Author : E. F. Knipling,Waldemar Klassen
Publisher : Unknown
Page : 64 pages
File Size : 44,9 Mb
Release : 1976
Category : Agriculture
ISBN : MINN:20000003131717
Author : Douglas M. Considine,Glenn D. Considine
Publisher : Springer Science & Business Media
Page : 3529 pages
File Size : 45,7 Mb
Release : 2013-12-11
Category : Technology & Engineering
ISBN : 9781475769180
Advancements in science and engineering have occurred at a surprisingly rapid pace since the release of the seventh edition of this encyclopedia. Large portions of the reference have required comprehensive rewriting and new illustrations. Scores of new topics have been included to create this thoroughly updated eighth edition. The appearance of this new edition in 1994 marks the continuation of a tradition commenced well over a half-century ago in 1938 Van Nostrand's Scientific Encyclopedia, First Edition, was published and welcomed by educators worldwide at a time when what we know today as modern science was just getting underway. The early encyclopedia was well received by students and educators alike during a critical time span when science became established as a major factor in shaping the progress and economy of individual nations and at the global level. A vital need existed for a permanent science reference that could be updated periodically and made conveniently available to audiences that numbered in the millions. The pioneering VNSE met these criteria and continues today as a reliable technical information source for making private and public decisions that present a backdrop of technical alternatives.
Author : Therese M. Poland,Toral Patel-Weynand,Deborah M. Finch,Chelcy Ford Miniat,Deborah C. Hayes,Vanessa M. Lopez
Publisher : Springer Nature
Page : 455 pages
File Size : 49,7 Mb
Release : 2021-02-01
Category : Science
ISBN : 9783030453671
This open access book describes the serious threat of invasive species to native ecosystems. Invasive species have caused and will continue to cause enormous ecological and economic damage with ever increasing world trade. This multi-disciplinary book, written by over 100 national experts, presents the latest research on a wide range of natural science and social science fields that explore the ecology, impacts, and practical tools for management of invasive species. It covers species of all taxonomic groups from insects and pathogens, to plants, vertebrates, and aquatic organisms that impact a diversity of habitats in forests, rangelands and grasslands of the United States. It is well-illustrated, provides summaries of the most important invasive species and issues impacting all regions of the country, and includes a comprehensive primary reference list for each topic. This scientific synthesis provides the cultural, economic, scientific and social context for addressing environmental challenges posed by invasive species and will be a valuable resource for scholars, policy makers, natural resource managers and practitioners.
