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Více informací o knize Twenty-Eighth Report of the State Entomologist on the Noxious and Beneficial Insects of the State of Illinois, 1915 (Classic Reprint)

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Excerpt from Twenty-Eighth Report of the State Entomologist on the Noxious and Beneficial Insects of the State of Illinois, 1915 The corn root-aphis, or corn root-louse, as it is more commonly called, is now the most generally injurious insect pest of the corn field in Illinois. Its injuries have been but little checked by all that has been done and printed concerning it, and they are evidently increasing slow ly in total effect. There is, in fact, no other corn-neld insect which is so frequently called to the attention of the economic entomologist. Nevertheless, the corn-root-aphis problem has been practically solved - not, perhaps, in the best way possible, or as completely as will be the case when time, money, and skilled assistance are all available for fur ther studies and experiments. Undoubtedly, however, if the results which have already been established were generally put to use in the practice of the Illinois farmer, this aphis would presently lose its place at the head of the list of insects affecting corn, and would be classed among those which are onlv occasionally injurious enough to call for special notice. It is the purpose of this article to set forth the results of our more recent investigations and experiments (1907 - 1910) in all necessary de~ tail, and to show what they signify and how they apply to the routine of corn culture in this state. The key to the control of this insect is to be found in its spring condition in old corn fields which have been infested by it the year preceding; and in the fact that corn is the only crop-plant upon which it lives and multiplies. This is substantially shown by the following facts. 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.

Parametry knihy

Zařazení knihy Knihy v angličtině Economics, finance, business & management Industry & industrial studies Primary industries

• Plný název: Twenty-Eighth Report of the State Entomologist on the Noxious and Beneficial Insects of the State of Illinois, 1915 (Classic Reprint)
• Autor: Stephen A. Forbes
• Jazyk: Angličtina
• Vazba: Brožovaná
• Počet stran: 124
• EAN: 9781333344566
• ISBN: 1333344562
• ID: 14139454
• Nakladatelství: Forgotten Books
• Hmotnost: 178 g
• Rozměry: 229 × 152 × 7 mm
• Datum vydání: 24. August 2016

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