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leaf galls, gouty oak gall, insecticide sprays: Since the galls do little damage to the tree there is really very little need to do anything. The population of the insects will vary by year and some years you will be hard pressed to find a gall and other years they will be numerious. ... Gouty oak twig galls are smooth;
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en.allexperts.com/q/Trees-739/Possible-Galls-Oak-Tree-1...
en.allexperts.com/q/Trees-739/Possible-Galls-Oak-Tree-1.htm
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I have an 85 year old oak tree in my yard that has sprouted galls. I have looked up almost everything I could about galls, but have yet to find the answer to this questions. Everyday my deck is covered with galls which appear to have been eaten.
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en.allexperts.com/q/Trees-739/Oak-Tree-Gall-1.htm
en.allexperts.com/q/Trees-739/Oak-Tree-Gall-1.htm
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Oak Apple Galls ... Leaf galls rarely affect tree health so control is rarely justified. However, an application of carbaryl (Sevin) at bud break may reduce infestations of some galls. It is difficult to spray moderate to large trees without special equipment and the necessary protective clothing to protect the applicator...
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www.ca.uky.edu/ENTOMOLOGY/entfacts/ef408.asp
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There are a variety of gall-forming species of small wasps that commonly infest oak, Quercus spp ., trees in Pennsylvania. Most leaf galls on oak cause little or no harm to the health of a tree. However, twig or branch galls may cause injury or even death to a heavily infested tree.
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ento.psu.edu/extension/factsheets/galls-oak
ento.psu.edu/extension/factsheets/galls-oak
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From time to time people call to ask about curiosly shaped, often brightly colored swellings that occur on oak tree leaves and twigs. The growths, called "galls," are usually the result of tiny wasps known as cynipids or gallwasps.
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cestanislaus.ucdavis.edu/files/176.htm
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If something’s bugging you, you might as well deal with it creatively. ... URCHINS ON OAKS? No worries. The growths on this blue oak are oak galls formed by the tree in response to tiny wasps. Urchin galls are very common in the Redding and Red Bluff areas.
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www.redding.com/news/2007/sep/08/natures-oddballs-oak-t...
www.redding.com/news/2007/sep/08/natures-oddballs-oak-tree-galls-are-strangely-intr/
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Our only reminder that some insects depend on oak flowers, leaves, fruit, and branches is the presence of noticeable and, sometimes, colorful and ornate galls on these plant parts. Each gall wasp species lays its eggs not only on specific parts of a tree, but also only on certain species of oaks.
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www.californiaoaks.org/ExtAssets/WaspGalls_RonRussoPost...
www.californiaoaks.org/ExtAssets/WaspGalls_RonRussoPoster.pdf
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Leaf infections called "galls" are bumps or growths caused as a result of the feeding and other activity of insects or mites. One particularly common version of this rapid explosion of growth is called the common oak gall and is most noticeable on the leaf, stem and twig of an oak tree.
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forestry.about.com/od/forestinsects/p/sect_com_ogall.ht...
forestry.about.com/od/forestinsects/p/sect_com_ogall.htm
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Generally, galls are not harmful to the tree, but there is a limit to how many a tree can produce without draining its vitality. Galls are one of the raw ingredients for iron-gall ink. For centuries, this ink was made by combining ferrous sulfate (Fe2SO4) with an extract from an oak gall (gallo-tannic acid).
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marcsala.blogspot.com/2005/11/oak-tree-galls.html
marcsala.blogspot.com/2005/11/oak-tree-galls.html
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