As to what is actually causing this problem, I’m not sure. The wilting/flagging almost makes me want to guess herbicide damage, but that would at the very least require close-up pics of the dying foliage, but really requires a site visit. @ OP, help us out and provide some more info
RFDrew11357
Emerald Ash Borer. The ones already infected are toast. Be prepared to take them down. I’d take down the ones that aren’t infected too b/c it’s only a matter of time if EAB is present.
5 Comments
I’d guess emerald ash borer making its way through your area on its journey of killing off all of North America’s ash population 😕
Not a expert but: Emerald Ash Borer.
Get a professional, they need to be taken care of quick.
Some look bad bc they’ve been preparing a feast & the guest has arrived. Specifically, EAB
Several comments about Emerald Ash Borer so far but this browning foliage isn’t how EAB damage/infestation typically presents.
I also snooped on OP’s profile to see where they are located, I’m guessing California? There have been no detected cases of EAB in California (yet), see https://www.aphis.usda.gov/plant-pests-diseases/eab/eab-infestation-map + https://www.cdfa.ca.gov/plant/PDEP/target_pest_disease_profiles/eab_profile.html
As to what is actually causing this problem, I’m not sure. The wilting/flagging almost makes me want to guess herbicide damage, but that would at the very least require close-up pics of the dying foliage, but really requires a site visit. @ OP, help us out and provide some more info
Emerald Ash Borer. The ones already infected are toast. Be prepared to take them down. I’d take down the ones that aren’t infected too b/c it’s only a matter of time if EAB is present.