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View Full Version : Gardeners and arborists, what the heck is on my tree?



Perks
05-01-2013, 02:55 AM
So there's this wild cherry tree and the leaves, normal, green, and unblemished until now,have sprouted with these really odd red projectile growths.

I'm going to go try to get a picture. Anyone know what this is?

Perks
05-01-2013, 03:32 AM
Okay, here's what it looks like -
http://i148.photobucket.com/albums/s40/Perks_album/a4903da4-27b6-4ed9-a497-ad47be24a205_zpse1f04578.jpg

http://i148.photobucket.com/albums/s40/Perks_album/913c2a03-d26f-4e3b-9e70-bcdbb28012d3_zpsa76ce340.jpg

Perks
05-01-2013, 03:39 AM
And, no, that's not my hand in the picture. Goodness!

Helix
05-01-2013, 03:44 AM
I think they're finger galls, which are produced by eriophyid mites.

ETA: Nothing to do with the other set of fingers in the pic!

amergina
05-01-2013, 03:49 AM
They're leaf galls caused by mites. The growths are actually part of the leaf.

The tree will drop the leaves at some point and there's not much to be done about them. They won't kill the tree or anything.

There's a webpage here (http://www.dnr.state.mn.us/young_naturalists/galls/index.html) about galls and if you scroll down, you'll see a picture of cherry pouch galls.

Medievalist
05-01-2013, 04:01 AM
http://extension.usu.edu/files/publications/factsheet/eriophyid-mites2010.pdf

http://hyg.ipm.illinois.edu/pastpest/200409e.html

http://missoulaeduplace.org/eriophyidmites.html

http://www.entomology.umn.edu/cues/Web/122EriophyidMites.pdf --This one is the least dire sounding.

Perks
05-01-2013, 04:13 AM
You guys are awesome. Now I shall not have to go to bed fearing alien pods encroaching...