What are these bumps on my Chestnut trees?

[MrWhitetail]

Hopefully somebody can save me some time researching this. I think I need to check my apple trees to see if they have any of these.

[Prof. Kent]

I've never seen it on apples before. It is either a twig canker disease or an insect borer. Try cutting into the canker and look for a worm. Otherwise it is a canker and all you can do is cut the diseased wood out and then disinfect your tools with 100% bleach.

[MrWhitetail]

I cut off some of these bumps and all I found was empty capsules with white powder on the stem under them. I have these things all over my chestnut trees and on some of my young (but stressed) apple trees. I may check with the local MSU Extension office horticulturalist one of these days to see what they say.

[Kent Eddy]

Please let us know what you find out.

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- Kent Eddy

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