Text-Book of the Diseases of Trees (Classic Reprint) - Hardcover

Hartig, Robert

9780483376472: Text-Book of the Diseases of Trees (Classic Reprint)

Hardcover

ISBN 10: 0483376477 ISBN 13: 9780483376472

Publisher: Forgotten Books, 2018

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Excerpt from Text-Book of the Diseases of Trees

Some fifty years ago a number of able investigators, of whom only Saxesen, Th. Hartig, and Ratzeburg need be named here, applied themselves to the study of insects. The life-history of forest insects, their harmfulness or usefulness, soon became the favourite study of many practical foresters, and in a few decades the joint efforts of numerous workers were rewarded by the elevation of Forest Entomology to the position of a much appreciated subject of scientific instruction, which has become the common property of all educated foresters.

The case was otherwise with those plant-diseases which cannot be ascribed to the injuries of animals. Their investi gation was delayed until quite recently; for it was only after botanical science, by the aid of its chief instrument, the microscope, had obtained a clear insight into the normal strue ture and vital phenomena of plants, and especially after the study of fungi had been prosecuted in the last few decades by a series of distinguished investigators, that the examination of the phenomena of disease in the life of plants could be undertaken with a prospect of success.

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