Ask a Question forum→What is this odd growth on the leaves of my cherry tree?

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Region: Utah Annuals Butterflies
May 19, 2018 3:21 PM CST
As I was looking at my cherry tree today, I saw this odd growth on the leaves. There are dark brown/black bumps on the leaves, and they are slimy. On the badly decayed leaves, there is a stringy cobweb-like growth.

What is this and what should I do about it? Is there a spray or other treatment I can apply to the tree to get rid of it?
Thumb of 2018-05-19/coolmen444/9c0d83

Name: Kyle
Middle TN (Zone 7a)
Region: Tennessee Plant and/or Seed Trader Cat Lover Dog Lover Roses Ferns
Hostas Foliage Fan Bromeliad Heucheras Native Plants and Wildflowers Birds
May 19, 2018 4:01 PM CST
Looks like aphids. I'd spray them with a basic insecticide but someone else might have a better solution.
Name: Tom Cagle
SE-OH (Zone 6a)
Old, fat, and gardening in OH
May 19, 2018 4:07 PM CST
My vote is aphids also. Try insecticidal soap.
free for them in need:
Region: Utah Annuals Butterflies
May 19, 2018 4:22 PM CST
Thanks for the replies, I took a closer look and realize that they are aphids. I'll probably spray with insecticides as you recommend.
Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
May 19, 2018 6:45 PM CST
The bad news is that most of the aphids are hiding out in those bundles of leaves. The good news is that summer heat kills them. The bad news is that they will be back next year. The good news is that there is a systemic insecticide that you can pour on the ground before the tree leafs out. The bad news is that your aphids are on your cherry tree and you can't use a systemic without killing you too.

Spray with insecticidal soap - make sure you drench every surface. You may want to find some concentrated insecticidal soap because those little spray bottles are not going to go far enough.
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

President: Orchid Society of Northern Nevada

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