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Many common trees are susceptible to leaf galls, especially in the spring. Maple, oak, elm, hackberry and others each are favored by a different insect that causes unsightly and intimidating galls. Damage will be greater following a mild winter, since more insects have survived and are hungry.
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gardening.about.com/od/insectpestid/qt/LeafGall.htm
gardening.about.com/od/insectpestid/qt/LeafGall.htm
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Moreover, very often it is easier to determin the presence of an insect by the gall it has formed, than it is to find the insect itself. Typically, when larvae develop inside these galls they eat the gall's tissue, which may be much softer and more ... The gall at the right is a very common one on cottonwood trees.
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www.backyardnature.net/galls.htm
www.backyardnature.net/galls.htm
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Galls occur on many different plants. These growths may be caused by insects, mites, fungi, bacteria, or nematodes, but insect galls are the most common. Gall-forming insects include ... Galls occur more frequently on the winter hosts, which usually are trees. Galls occur in the spring after overwintering eggs hatch.
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About 80 percent of the gall wasps produce galls specifically on oak trees. In fact, 60 percent of all known insect galls occur in the oak family and 30 percent occur in the daisy, ... Topics: Entomology and Nematology | Landscape Pests | Urban Shade Trees | Insect Galls | Short, Donald E | Castner, James L...
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Sounds like a gall insect. Galls are irregular plant growths which are stimulated by the reaction between plant hormones and powerful growth regulating chemicals produced by some insects or mites. Galls may occur on leaves, bark, flowers, buds, acorns, or roots. ... More Trees Answers; Question Library;
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en.allexperts.com/q/Trees-739/2009/4/DYING-OAK-TREE.htm
en.allexperts.com/q/Trees-739/2009/4/DYING-OAK-TREE.htm
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More Trees Answers; Question Library; ... More than likely not- insects are the most part species related insects that will attack one tree will not bother another. Insect galls really do not harm the health of a tree so IF they were to attack the new oak they would not do much damage.
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en.allexperts.com/q/Trees-739/2009/6/gall-white-oak-tre...
en.allexperts.com/q/Trees-739/2009/6/gall-white-oak-tree.htm
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Preventive treatments applied before the galls form and properly timed to coincide with the development of the plant and the attack by the gallmaker may be effective but are usually not practical. Obtain IC-417, Insect Galls on Trees and Shrubs for additional information.
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www.ipm.iastate.edu/ipm/pme/urbanipm/lady/trees/galls.h...
www.ipm.iastate.edu/ipm/pme/urbanipm/lady/trees/galls.html
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The good news about galls is the majority do little or no damage to trees. The trees are just well accessorized. Generally there is enough unaffected foliage for the trees to remain vigorous.
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web.extension.uiuc.edu/champaign/homeowners/000617.html
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Every homeowner has had problems with insects attacking shade trees and shrubs in their landscape. ... The shape, size, and color are extremely variable, but appearance of the galls is unique to the insect causing them. Most gall-making insects and mites are not harmful to the host plant. Control attempts are rarely...
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www.ag.ndsu.edu/pubs/plantsci/trees/e296w.htm
www.ag.ndsu.edu/pubs/plantsci/trees/e296w.htm
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