. Elementary textbook of economic zoology and entomology. Zoology; Insect pests. 428 ECONOMIC ZOOLOGY AND ENTOMOLOGY often making a complete band around a twig. They are covered with a frothy, glue-like substance which protects them during the winter and furnishes the first meals for the young larvae. These pests have many natural enemies, such as birds, Hymenopterous parasites and an important bacterial disease. These help much to control them, but it is sometimes necessary. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readabil
. Elementary textbook of economic zoology and entomology. Zoology; Insect pests. 428 ECONOMIC ZOOLOGY AND ENTOMOLOGY often making a complete band around a twig. They are covered with a frothy, glue-like substance which protects them during the winter and furnishes the first meals for the young larvae. These pests have many natural enemies, such as birds, Hymenopterous parasites and an important bacterial disease. These help much to control them, but it is sometimes necessary. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Kellogg, Vernon L. (Vernon Lyman), 1867-1937; Doane, Rennie Wilbur, 1871-. New York, H. Holt and company
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License: Licensed
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Keywords: ., bookaut, bookpublishernewyorkhholtandcompany, booksubjectzoology
