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Author: John Merton Aldrich
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 26
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Book Description
Author: John Merton Aldrich
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 26
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Book Description
Author:
Publisher:
ISBN:
Category : Anabrus simplex
Languages : en
Pages : 9
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Book Description
Author: Jeffrey A. Lockwood
Publisher: Springer Science & Business Media
ISBN: 9401143374
Category : Science
Languages : en
Pages : 236
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Book Description
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.
Author: John Robert Parker
Publisher:
ISBN:
Category : Grasshoppers
Languages : en
Pages : 28
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Book Description
"This bulletin on grasshoppers is intended to help county agricultural agents, entomologists, and other agricultural leaders. It presents in everyday language the more important facts about grasshoppers. It describes the damage they do; it tells what different species look like, how they develop, and where and how they live; and it explains how outbreaks occur."--Page 2.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 100
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Book Description
Author: Jean-Henri Fabre
Publisher:
ISBN:
Category : Grasshoppers
Languages : en
Pages : 472
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Book Description
Author: United States. Congress. Senate. Committee on Energy and Natural Resources. Subcommittee on Public Lands, Reserved Water, and Resource Conservation
Publisher:
ISBN:
Category : Crickets
Languages : en
Pages : 120
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Book Description
Author: United States. Congress. House. Committee on Resources. Subcommittee on National Parks, Recreation, and Public Lands
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 48
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Book Description
Author:
Publisher: Sunstone Press
ISBN: 0865346909
Category : Grasshoppers
Languages : en
Pages : 138
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Book Description
Bronson's fascinating book about grasshoppers and other related insects--crickets and katydids--reveals how they are equipped for life and how they act from birth to death. Particularly interesting are the incidents and examples that are drawn from his observation of his own insect collection.
Author: United States. Congress. Senate. Committee on Energy and Natural Resources. Subcommittee on Public Lands, Reserved Water, and Resource Conservation
Publisher:
ISBN:
Category : Crickets
Languages : en
Pages : 132
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Book Description
