Injurious Insects and the Use of Insecticides: A New Descriptive Manual on Noxious Insects, With Methods for Their Repression (Classic Reprint) - Rilegato

Sempers, Frank W.

Rilegato

ISBN 10: 0656293616 ISBN 13: 9780656293612

Casa editrice: Forgotten Books, 2018

Riassunto

Excerpt from Injurious Insects and the Use of Insecticides: A New Descriptive Manual on Noxious Insects, With Methods for Their Repression

Within a few years great changes have taken place in the methods of dealing with destructive insects. The rapid advances made in the science of economic entomology, the introduction of several highly efficient insecticides and the invention of labor-saving mechanical appliances for use in Spraying, have done much to awaken farmers to the needs of broader knowledge and more scientific methods in com bating noxious insects.

Scarcely twenty years ago the best farmers paid little attention to insect depredations. Such losses were regarded as of no significance, or as a part of the ordinary risks of farming. They were looked upon as occasional but inevitable evils which it was nobody's business to try to prevent. In the early Seventies when Dr. Riley and a few other scientists were laboring to overcome popular prejudice against the use of Paris green, in fighting the Colorado Potato-beetle, agriculturists, as a class, were indifferent and inactive until brought to their senses by serious losses or by the complete destruction of crops. But we have learned better since those times. To-day it is only the thriftless farmer who insists on growing crops to be eaten up by insects.

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Dettagli dell'edizione

• Editore: Forgotten Books
• Data di pubblicazione: 2018
• Lingua: Inglese
• ISBN 10: 0656293616
• ISBN 13: 9780656293612
• Rilegatura: Copertina rigida
• Numero di pagine: 224
• Contatto del produttore: non disponibile
• Persona responsabile: Bärenreiter-Verlag Karl Vötterle GmbH & Co. KG; bscheuch@baerenreiter.com; ; Heinrich-Schütz-Allee 35-37; Kassel; Germania; 34131; Germania