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The Barrier Factors in Gipsy Moth Tree-Banding Material (Classic Reprint) PDF
By:Marcus Thomas Smulyan
Published on 2018-03-21 by Forgotten Books

Excerpt from The Barrier Factors in Gipsy Moth Tree-Banding Material That the two factors of (1) odor, and (2) soft and semiviscid con dition, operate together in enabling the gipsy moth tree-banding material to halt the caterpillars in their efforts to ascend to the foliage, was clearly demonstrated by the qualitative tests described in this paper. The first series, in which the solid odorous bands were used, could not be considered conclusive, for physical or tech nical reasons (p. But it, indicatedclearly that the first element, namely, odor, exercises at least a restraining influence. The second series, in which bands made of actual gipsy moth tree-banding ma terial were used, demonstrated satisfactorily that the soft and semi viscid; or viscous, condition of the material is the basic or primary factor. The odor restrained, indeed, but when acting alone did not completely check; whatever dislike or fear it inspired Was overcome sooner or later}? This series approximated closely to actual conditions, especially in the case of the narrowly bridged.bands, ' in which the odor, after the strips of cloth became saturated with the material, was but little if at all interfered with or masked; indeed, the total odor emitted by some of these bands was far greater than would have been emitted, under the same conditions, by the smaller sized standard band,16 the odor being strong enough in the warm and rather confined atmosphere of the laboratory to irritate to a considerable degree, at a distance of about 2 feet, the nasal membrane of the writer. The various check. Bands used, namely, flour paste, flour-molasses, molasses, and also a commercial sticky tree-banding material, served very well, and if the last three were somewhat more viscid or gluey than the bands made from the gipsy moth tree bandi'ng material, this fact was offset by the greater odor given off by the large size of the latter bands. The caterpillars, it should be added, seemed to dislike Or fear the odorless and nonirritating check bands in proportion as they were viscid, or sticky, and they reacted to these very often, especially to the more viscid, fully as promptly as to the gipsy moth tree-banding material bands. This fact is further evidence of the importance of the viscid fa'cto'r in the banding material, and is of value, obviously, in the elaboration of an efficient barrier band not only against gipsy moth caterpillars but also against any species of similar behavior. An illustration of the practical operation of this fact is perhaps seen in the efliciency of newly applied or newly combed bands of a com mercial sticky tree-banding material, the odor Or exhalation of which is weaker and otherwise less repellent than that (if the gipsy moth tree-banding material, especially on warm days, An atmosphere consisting of, or heavily charged with, the exhalation or. Volatilized portion ofthe latter in a Container, will disable a cater. 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.

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Book ID of The Barrier Factors in Gipsy Moth Tree-Banding Material (Classic Reprint)'s Books is 70RvtQEACAAJ, Book which was written byMarcus Thomas Smulyanhave ETAG "P70gc/6S8qI"

Book which was published by Forgotten Books since 2018-03-21 have ISBNs, ISBN 13 Code is 9780365235453 and ISBN 10 Code is 0365235458

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