The Life History Of Two Species Of Plant Lice
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The Life History Of Two Species Of Plant Lice
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Author : Theo Pergande
language : en
Publisher: Forgotten Books
Release Date : 2017-10-13
The Life History Of Two Species Of Plant Lice written by Theo Pergande and has been published by Forgotten Books this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-10-13 with Science categories.
Excerpt from The Life History of Two Species of Plant-Lice: Inhabiting Both the Witch Both the Witch-Hazel and Birch What becomes of this particular species during the intervening time after leaving its gall remained a profound mystery to the writer for many years, notwithstanding continuous efforts to solve the problem. Accidentally, while on a. Collecting trip near Tacoma, D. C., in Sep tember, 1890, the writer observed a peculiar Aphid inhab.ting the under side of the leaves of a small shrub of Betula nigra, but failed at that time to recognize it as the missing link of Hormaphis. During the following seven years nothing additional was discovered to cause me to continue observations, this being due in a great measure to the destruction of large numbers of witch-hazel bushes and young birches, and the consequent scarcity of galls in the woods surrounding the city of Washington. Fortunately, however, I discovered in September, 1897, a number of witch-hazel trees and bushes, as well as young birches, in a narrow and protected valley near the edge of a small creek at Cabin John Bridge, Md., where I found numerous old anddry galls on the leaves of the witch-hazel. Here I began again my search for the evading generations of this species, and in examining the leaves of birches rediscovered on many of them the same peculiar Aphid which had previously been found at Tacoma. It was in various Stages of development, including the winged migrants, which proved, after a thorough examination and comparison with the Spring migrants of the witch - hazel, to be identical with Hormaphis hama melidis. To be sure of no mistake an examination was made of the leaves of witch-hazels near the birches with the result that the under side of numerous leaves was found to be almost completely covered with larvae of various stages, and among them numerous specimens of the migrants from birch, actively engaged depositing their progeny, which later on proved to be the sexual generation. This settled the previously obscure question as to the secondary host of the interme diate generations, and enabled me to continue and to complete my prctracted observations of the life history of this remarkable little species and the strange transformations it undergoes on the birches which will be recorded in the following pages. 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.
The Life History Of Two Species Of Plant Lice Inhabiting Both The Witch Hazel And Birch
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Author : Theodore Pergande
language : en
Publisher:
Release Date : 1901
The Life History Of Two Species Of Plant Lice Inhabiting Both The Witch Hazel And Birch written by Theodore Pergande and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1901 with Aphids categories.
The Life History Of Two Species Of Plant Lice Inhabiting Both The Withhazel And Birch
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Author : Theo Pergande
language : en
Publisher:
Release Date : 1901
The Life History Of Two Species Of Plant Lice Inhabiting Both The Withhazel And Birch written by Theo Pergande and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1901 with categories.
The Life History Of Two Species Of Plant Lice Inhabiting Both The Witch Hazel And Birch
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Author : Theodore Pergande
language : en
Publisher:
Release Date : 1901
The Life History Of Two Species Of Plant Lice Inhabiting Both The Witch Hazel And Birch written by Theodore Pergande and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1901 with Aphids categories.
The Life History Of Two Species Of Plant Lice Inhabiting Both The Witch Hazel And Birch
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Author : Theodore Pergande
language : en
Publisher:
Release Date : 1901
The Life History Of Two Species Of Plant Lice Inhabiting Both The Witch Hazel And Birch written by Theodore Pergande and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1901 with Aphis categories.
The Life History Of Two Species Of Plant Lice Hormaphis Hamamelidis Hamamelistes Spinosus Inhabiting Both The Witch Hazel And Birch By Theo Pergande
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Author : Theodore Pergande
language : en
Publisher:
Release Date : 1901
The Life History Of Two Species Of Plant Lice Hormaphis Hamamelidis Hamamelistes Spinosus Inhabiting Both The Witch Hazel And Birch By Theo Pergande written by Theodore Pergande and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1901 with categories.
Life History Of 2 Species Of Plant Lice Inhabiting Both Witch Hazel And Birch
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Author :
language : en
Publisher:
Release Date : 1901
Life History Of 2 Species Of Plant Lice Inhabiting Both Witch Hazel And Birch written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1901 with Aphids categories.
Technical Series
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Author : United States. Bureau of Entomology
language : en
Publisher:
Release Date : 1895
Technical Series written by United States. Bureau of Entomology and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1895 with Beneficial insects categories.
Circular
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Author : United States. Bureau of Entomology
language : en
Publisher:
Release Date : 1891
Circular written by United States. Bureau of Entomology and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1891 with Insects categories.
An Index To Circulars 1 To 100 Of The Bureau Of Entomology
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Author : Rolla P. Currie
language : en
Publisher:
Release Date : 1911
An Index To Circulars 1 To 100 Of The Bureau Of Entomology written by Rolla P. Currie and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1911 with Agricultural pests categories.