ATH
Been here much more than a while
- Location
- Findlay, Ohio
What's going on here?
City Forester, State Urban Forester, 2 other arborist friends I reached out to, Rainbow sales rep who is often pretty helpful - all never seen it before. I emailed OSU entomologist. He was kind enough to reply after hours on a Friday on his way to vacation: Suggested we first contact APHIS to make sure its not Asian Longhorn Beetle (I don't think it is...but he's got a good point, we should have them confirm that) and we'll talk more when he's back in town.
What has us stumped: Dozens of Red maple (A. rubrum) - mostly 5-8" DBH trees - with snapped twigs, generally around 1" diameter...didn't notice any bigger than 2", none as small as 1/2". Mostly just 1-3 twigs per tree. Most twigs are snapped, but still attached. They had leaves this year...some still green with just enough cambium remaining to get water to the leaves. Every snapped twig I could get my hands on has an insect gallery in it.
First, let's get the obvious out of the way...yes, they are stressed: chlorotic (likely high pH, haven't tested yet); mulch volcanoes (I've seen worst, there are actually a fair number of trees with visible flares); plant barrier under the mulch. But nothing atypical of Red maple in alkaline soil around here. FWIW, Acer x freemanni in the area, likely part of the same planting are 12"+ DBH and twice as tall.
City forester found one with a larvae in mid June. I didn't see any larvae today...
I can get more pics or higher resolution pics if that would help. I'll bring a pole pruner when I am up there next week to look at more branches...I couldn't reach too many from the ground with hand pruners.
City Forester, State Urban Forester, 2 other arborist friends I reached out to, Rainbow sales rep who is often pretty helpful - all never seen it before. I emailed OSU entomologist. He was kind enough to reply after hours on a Friday on his way to vacation: Suggested we first contact APHIS to make sure its not Asian Longhorn Beetle (I don't think it is...but he's got a good point, we should have them confirm that) and we'll talk more when he's back in town.
What has us stumped: Dozens of Red maple (A. rubrum) - mostly 5-8" DBH trees - with snapped twigs, generally around 1" diameter...didn't notice any bigger than 2", none as small as 1/2". Mostly just 1-3 twigs per tree. Most twigs are snapped, but still attached. They had leaves this year...some still green with just enough cambium remaining to get water to the leaves. Every snapped twig I could get my hands on has an insect gallery in it.
First, let's get the obvious out of the way...yes, they are stressed: chlorotic (likely high pH, haven't tested yet); mulch volcanoes (I've seen worst, there are actually a fair number of trees with visible flares); plant barrier under the mulch. But nothing atypical of Red maple in alkaline soil around here. FWIW, Acer x freemanni in the area, likely part of the same planting are 12"+ DBH and twice as tall.
City forester found one with a larvae in mid June. I didn't see any larvae today...
I can get more pics or higher resolution pics if that would help. I'll bring a pole pruner when I am up there next week to look at more branches...I couldn't reach too many from the ground with hand pruners.
