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Hackberry Tree w/ an insect problem

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From: Barb Thomas City: Newton, IL
I have what some people have told me is a Hackberry tree in our backyard. It seems to have a problem with some kind of insect raising bumps all over the leaves and the tree is also losing leaves. I noticed this a few years ago and have fertilized it over the last two years which I thought was helping. However, this year the problem seems to be worse. How can I get the problem identified and learn what I can do to help the tree? This is a large older tree that is our main shade tree for the house.
	Extension Message From: Jay Hayek Extension Specialist, Forestry Department of Natural Resources and Environmental Sciences jhayek@illinois.edu
Hi Barb: Thanks for the question and thanks for including the species and symptoms! Based on your excellent description, I believe you're observing hackberry nipple gall: http://extension.cropsciences.illinois.edu/turf/insects/hackberry_psyllids/ https://extension.entm.purdue.edu/publications/HN-86.pdf Treatment is usually not warranted. Best of luck, Jay
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