Date: Around 1999
I have two large old cotton woods on my property. Recently
I have noticed an infestation of some kind. Most of the leaves have a
bubble type growth on each leaf where the leaf meets the stem. I suspect
this is a parasite as the leaves have several holes in them. I have not
seen a broken casing yet, but suspect this is a cacoon of some sort or
an egg pouch. Have you seen anything like this before? Is there anyway
to prevent this?
Insect galls probably due to aphids:
ladybugs for insect control:
Anthony R. Brach, Ph.D.
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Update: June 2012