Download or read book Bulletin of the Pan American Union written by Pan American Union and published by . This book was released on 1942 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Grasshopper Integrated Pest Management Handbook written by and published by . This book was released on 1996 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Locust written by Jeffrey A. Lockwood and published by Basic Books. This book was released on 2009-04-28 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Throughout the nineteenth century, swarms of locusts regularly swept across the continent, turning noon into dusk, demolishing farm communities, and bringing trains to a halt as the crushed bodies of insects greased the rails. In 1876, the U.S. Congress declared the locust "the single greatest impediment to the settlement of the country." From the Dakotas to Texas, from California to Iowa, the swarms pushed thousands of settlers to the brink of starvation, prompting the federal government to enlist some of the greatest scientific minds of the day and thereby jumpstarting the fledgling science of entomology. Over the next few decades, the Rocky Mountain locust suddenly -- and mysteriously -- vanished. A century later, Jeffrey Lockwood set out to discover why. Unconvinced by the reigning theories, he searched for new evidence in musty books, crumbling maps, and crevassed glaciers, eventually piecing together the elusive answer: A group of early settlers unwittingly destroyed the locust's sanctuaries just as the insect was experiencing a natural population crash. Drawing on historical accounts and modern science, Locust brings to life the cultural, economic, and political forces at work in America in the late-nineteenth century, even as it solves one of the greatest ecological mysteries of our time.

Download or read book Report of the Delegation of the United States of America to the Third Inter American Conference on Agriculture Caracas Venezuela July 24 August 7 1945 written by United States. Department of State and published by . This book was released on 1947 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Grasshoppers and Grassland Health written by Jeffrey A. Lockwood and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Acridids (grasshoppers and locusts) can range from being rare curiosities to abundant menaces. Some are threatened with extinction and become subjects of intensive conservation efforts, while others are devastating pests and become the objects of massive control programmes. Even within a species, there are times when the animal is so abundant that its crushed masses cause the wheels of trains to skid (the Rocky Mountain grasshopper, Melanoplus spretus Walsh in western North America in the 1860s and I 870s), while at other times the animal is alarmingly scarce (the Rocky Mountain grasshopper went extinct in the early 1900s). Why are there these extremes in one insect family, and even in a single species? The NATO workshop examined this paradox and its implications for Environmental Security, which must address both the elements of land use (agricultural production and pest management) and conservation of biodiversity. The reconciliation of these objectives clearly demands a critical assessment of current knowledge and policies, identification of future research, and close working relationships among scientists. Insects can present two clear faces, as well as the intervening gradation. These extremes require us to respond in two ways: conservation of scarce species and suppression of abundant (harmful) species. But perhaps most important, these opposite poles also provide the opportunity for an exchange of information and insight.

Download or read book Edges of Exposure written by Noémi Tousignant and published by Duke University Press. This book was released on 2018-04-19 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the industrialized nations of the global North, well-funded agencies like the CDC attend to citizens' health, monitoring and treating for toxic poisons like lead. How do the under-resourced nations of the global South meet such challenges? In Edges of Exposure, Noémi Tousignant traces the work of toxicologists in Senegal as they have sought to warn of and remediate the presence of heavy metals and other poisons in their communities. Situating recent toxic scandals within histories of science and regulation in postcolonial Africa, Tousignant shows how decolonization and structural adjustment have impacted toxicity and toxicology research. Ultimately, as Tousignant reveals, scientists' capacity to conduct research—as determined by material working conditions, levels of public investment, and their creative but not always successful efforts to make visible the harm of toxic poisons—affects their ability to keep equipment, labs, projects, and careers going.

Download or read book Report written by United States. Delegation to the Inter-American Conference on Agriculture, 3d, Caracas, 1945 and published by . This book was released on 1947 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The National Union Catalog Pre 1956 Imprints written by and published by . This book was released on 1968 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Grasshopper Integrated Pest Management written by and published by . This book was released on 1991 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book National Union Catalog written by and published by . This book was released on 1970 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes entries for maps and atlases.

Download or read book United Nations Regional Cartographic Conference for the Americas written by and published by . This book was released on 1985 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gypsy Moth Management in the United States Chapters 1 9 and appendixes A E written by and published by . This book was released on 1995 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gypsy Moth Management in the United States written by United States. Forest Service and published by . This book was released on 1995 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gypsy Moth Management in the United States written by and published by . This book was released on 1995 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalogue United States Public Documents written by United States. Superintendent of Documents and published by . This book was released on 1923 with total page 1066 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Third Session of the Council of Foreign Ministers written by Council of Foreign Ministers and published by . This book was released on 1947 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fourth United Nations Regional Cartographic Conference for the Americas Technical papers written by United Nations. Department of Technical Cooperation for Development and published by New York : United Nations. This book was released on 1989 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: In English, French & Spanish. Parallel title: Quatriáme confârence cartographique râgionale des nations unies pour l'amârique