What is wrong with my pecan tree?
Pecan Tree
The gall-like bumps are the result of pecan phylloxera infestation. The eaten leaves are probably the result of some caterpillar consuming them - forest tent caterpillar is a common problem on mine, but there are others that might bet the culprit.
I have these same bumps on mine. When I tear them open I can see very tiny little flies and sometimes a maggot looking thing. I asked this question in the tree forum but nobody knew what it was.
Here's an article on Pecan Phylloxera.
http://www.lsuagcenter.com/en/lawn_garden/commercial_horticulture/fruits_nuts/Pecan+Phylloxera.htm
And another one on various pecan pests/diseases, including PP:
http://muextension.missouri.edu/xplor/miscpubs/mp0711.htm
I guess I'd forgotten about there being three species of phylloxera; I most frequently encounter damage compatible with the 'leaf' phylloxera types, but thinking back on it, I frequently saw PP lesions on shoots on the old Mahan trees in the yard back home in AL.
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