[NatureNS] Curious growths on oak tree leaves

Date: Thu, 16 Jul 2009 18:21:57 -0300
From: Phil & Maria <philmaria@xplornet.com>
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I have an oak tree that is probably about 12 years old.  Every year 
these curious "balls" form on some of the leaves...they deform the 
leaf.  These "balls" seem to be filled with air and have small white 
bumps on them.   As time goes on, they develop one single "bored" hole.  
If you crack open the ball, inside is a tiny brown ball covered in pale 
green soft, fuzzy spikes, and a single hole "bored" in it in the exact 
same place as the hole bored on the outer shell.  These "balls" don't 
seem to affect the tree in any way, it appears healthy and is growing 
(slowly, but growing!).  Eventually, these balls deteriorate and remind 
you of a tiny wasp nest...all that is left on the tree is the top 1/4 of 
the ball.
Below are links to two pictures I took today.  Does anyone have any idea 
what this is?  I'm guessing it is some type of insect or worm, but in 
all the ones I cracked open there were no signs of movement. 



http://thumb5.webshots.net/t/96/96/1/43/7/2259143070101775065TOAfkX_th.jpg

http://thumb5.webshots.net/t/96/96/6/52/23/2592652230101775065HFuOGE_th.jpg

Maria Forman
Debert NS

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