Emergence of Pear Thrips in the Healdsburg Area of California in 1932 PDF Download
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Languages : en
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Author: Leslie Malcolm Smith
Publisher: Forgotten Books
ISBN: 9780266864110
Category :
Languages : en
Pages : 20
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Excerpt from The Emergence of Pear Thrips in the Healdsburg Area of California in 1932 The total emergence occurred over a period of 38 days, from February 19 until March 27. The peak of the emergence (empirical mode) and the arithmetical mean occurred on March 9. The normal curve of emergence was distorted by the influence of temperature. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Leslie Malcolm Smith
Publisher:
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Category : Agriculture
Languages : en
Pages : 24
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Author: Shirley Watson Foster
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Category : Fruit
Languages : en
Pages : 66
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Author: Bruce L. Parker
Publisher: Springer Science & Business Media
ISBN: 1489914099
Category : Science
Languages : en
Pages : 606
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Thrips (fhysanoptera) are very small insects, widespread throughout the world with a preponderance of tropical species, many temperate ones, and even a few living in arctic regions. Of the approximately 5,000 species so far identified, only a few hundred are crop pests, causing serious damage or transmitting diseases to growing crops and harvestable produce in most countries. Their fringed wings confer a natural ability to disperse widely, blown by the wind. Their minute size and cryptic behavior make them difficult to detect either in the field or in fresh vegetation transported during international trade of vegetables, fruit and ornamental flowers. Many species have now spread from their original natural habitats and hosts to favorable new environments where they often reproduce rapidly to develop intense damaging infestations that are costly to control. Over the past decade there have been several spectacular examples of this. The western flower thrips has expanded its range from the North American continent to Europe, Australia and South Africa. Thrips palmi has spread from its presumed origin, the island of Sumatra, to the coast of Florida, and threatens to extend its distribution throughout North and South America. Pear thrips, a known orchard pest of Europe and the western United States and Canada has recently become a major defoliator of hardwood trees in Vermont and the neighboring states. Local outbreaks of other species are also becoming problems in field and glasshouse crops as the effectiveness of insecticides against them decline.
Author: U.S. Office of Experiment Stations
Publisher:
ISBN:
Category : Agricultural experiment stations
Languages : en
Pages : 1048
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Author: Charles Edwin Kellogg
Publisher:
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Category : Agriculture
Languages : en
Pages : 772
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Author: United States. Office of Experiment Stations
Publisher:
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Category : Agricultural experiment stations
Languages : en
Pages : 1048
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Author: United States. Department of Agriculture
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Category :
Languages : en
Pages :
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Author:
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Category : Agriculture
Languages : en
Pages : 526
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