Trees and Shrubs forum: Cocoons or something like it?

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Nov 17, 2017 7:10 AM CST
I live in Dutchess county new york and as the leaves dropped from my ornamental tree i noticed the cocoons in the attached pictures. There are 4 or 5 of them, and i am wordering what they are,if the insect is harmful, and is the larva still in the cocoon?

At least I think its a cocoon, but any input would be greatly appreciated!
Thumb of 2017-11-17/nickl87/f2a3dd
Thumb of 2017-11-17/nickl87/526773

Name: Amanda
KC metro area, Missouri (Zone 6a)
Roses Zinnias Region: Missouri Cat Lover Dog Lover Bookworm
Native Plants and Wildflowers Region: United States of America Million Pollinator Garden Challenge
Nov 17, 2017 9:20 PM CST
It's some type of gall. What type of tree is it?
Name: John
Scott County, KY (Zone 5b)
You can't have too many viburnums..
Region: United States of America Region: Kentucky Farmer Cat Lover Birds Bee Lover
Butterflies Enjoys or suffers hot summers Enjoys or suffers cold winters Dog Lover Hummingbirder Lover of wildlife (Raccoon badge)
Nov 18, 2017 7:44 PM CST
That is some sort of Prunus sp., probably a Cherry selection. That problem is something like Black Knot, which needs to be pruned out of that Prunus sp.

I would suggest taking a sample of a pruned-out branch to the local Cooperative Extension Service office, and have a positive identification made of the disease - and get an appropriate recommended course of action.

Name: Frank Mosher
Nova Scotia, Canada (Zone 6a)
Lover of wildlife (Raccoon badge) Birds Roses Clematis Lilies Peonies
Region: Canadian Photo Contest Winner: 2017 Million Pollinator Garden Challenge
Feb 26, 2018 12:40 PM CST
John is right on! That is definitely "blackknot"! You should prune it out, at least about four or five inches away from the "abnormality"! Burn your cuttings!! However, I hate to be the bearer of bad news, but every "European Plum" I ever had, "Damson" in particular, with "black knot" is now deceased. With respect to sweet or sour Chery Trees, unfortunately, the same results. I so empathise with you!!!

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