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Collins New Naturalist Library (117) - Plant Galls
Amazon UK — Author Margaret Redfern EAN 9780002201438 ISBN 0002201437 Eligible For Trade In? YES Number Of Pages 576 Publication Date 2011-04-28 SKU 579127More…
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Leaf Galls on Maple
PSU Entomology — Erineum galls are caused by several species of eriophyid mites in the genus Eriophyid mites that infest maple foliage overwinter as adults under bark scales and other protected sites on the host tree where they are able to withstand severe ...More…
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Galls on Oak
PSU Entomology — There are a variety of gall-forming species of small wasps that commonly infest oak, Galls are abnormal plant growth or swellings comprised of plant tissue. Galls are usually found on foliage or twigs. These unusual deformities are caused by ...More…
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Galls & Outgrowths
Clemson University Extension — Galls are abnormal swellings or localized outgrowths (tumors) of plant tissue. They are extremely variable in size, shape and their location on the plant. Some are little more than a blister on the surface of a leaf while others are large, warty ...More…
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Leaf Galls Common on Tree Foliage
University of Illinois Extension — Noticed any unusual bumps or distorted growth on the leaves of your trees? Most likely these are galls. Although they may appear damaging, they rarely cause problems for trees and not much can be done about them. Galls are actually distorted ...More…
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Oak galls. (Gardening In General).(galls formed when ...
Amazon.com — Author W.J. Turnock Format HTML Number Of Pages 4 Publication Date 2002-01-01 Release Date 2005-07-30More…
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Figure 2: Continued expansion of galls on older wood.
Colorado State University Extension — The poplar twiggall is an increasingly common gall along the Front Range found on the twigs and branches of cottonwoods, poplars, and particularly aspen. This gall is caused by an insect, the poplar twiggall fly. Poplar twiggall fly produces a ...More…
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Insect and Mite Galls
Colorado State University Extension — Galls are abnormal growths of plant tissue caused by a wound, infection by a microorganism, or the feeding and egg-laying activity of certain Insects and mites. Although galls are conspicuous and unattractive, they rarely cause serious ...More…
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Cooley Spruce Galls
Colorado State University Extension — Cooley spruce galls are common and conspicuous on blue spruce; however, the galls cause little or no harm to the health of the tree. The galls are produced by aphid-like Insects, Cooley spruce gall adelgids. Cooley spruce galls are common and ...More…
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Common Oak Galls
University of Kentucky — Twig and stem galls, such as the gouty oak gall and horned oak gall, are solid, woody masses that can girdle branches or make them droop from the sheer weight of the heavy growths. The galls can grow to more than 2 inches in diameter. Horned oak ...More…