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PostPosted: Tue May 18, 2004 9:00 am 
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Joined: Tue May 18, 2004 8:55 am
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Location: Dallas
Our red oak (about 8 years old) has some small, red, somewhat translucent sacks hanging from some of its leaves. They are very round, between a marble and golf ball size. Only about 4 or 5 that I have seen this year, but I have seen more in years prior. I have no idea what they are and therefore what, if anything, I should do about them. Anyone?

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PostPosted: Tue May 18, 2004 1:33 pm 
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Joined: Fri Apr 04, 2003 1:52 pm
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Location: Dallas,TEXAS
Sounds like galls.

Galls
Swollen masses of abnormal plant tissue caused by fungi, bacteria or insects. There are many different kinds of galls primarily caused by wasp, fly, and aphid insects, they are usually more cosmetic than damaging. Insects “sting” a plant, which causes a growth that the insect uses as a home for its young. The gall serves as a shelter and food supply. Although unsightly, most galls are not considered very damaging. Natural control is biodiversity. Healthy plants seem to have fewer galls. Improve the general health of trees using the Basic Organic Program.

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