TreeAzin= Brittle limbs

KevinS

KevinS

Branched out member
Location
ontario
We are hearing anecdotal reports from other municipalities that trees previously injected with TreeAzin are seeming to be much more brittle than they should be (compared to uninjected ash not showing EAB signs yet). Has anyone else experienced this?

I hope this doesn't bother any one but this is not my thread I hijacked it from Katz in bugs and crud but it is something I've been hearing about and like Katz would love any information anyone has. With the dead ash going around it won't hurt anyone to be a little extra aware of what they're working with.

Thanks Katz for wording this better than I could.
 
Were the trees previously infected by EAB? Which municipalities are you talking about? Are these ash trees that were damaged due to the ice storm?
I have noticed a lot of city owned ash trees falling apart in North York due to the ice storm. But I have no idea if they were injected or not.
I haven't seen too much damage from properties that we previously injected, but I'll keep an eye open.
 
The information we initially received from our counterparts with the Mid-West utilities was to focus our removals on EAB killed ash along our rear-lot facilities. We were told that the stems, and more importantly, the roots, snapped easily. Subsurface whole tree failure after only 2 seasons deceased was a high probability.

Since then, Anand Persad of Davey Tree highlighted research at the NY ISA Chapter’s Winter Seminar this past January that shows EAB killed ash are more brittle and fail differently than non-infected trees. It was one of only a few presentations that I’ve been to that had a 200+ crowd glued to his every word/slide. Pretty neat stuff as he used a NASA camera to pick up the tension/compression of the branch as it was weighted to failure.

I don’t know if the full research encompassed pesticide treated trees. Anand said that this research was headed to paper and would soon be out to the public via the trade magazines.
 
Let's see; are trees that have been chewed to death more brittle than unchewed trees? Hmmmm......
Anand's work at Biomechanics Week did not have a control sample of injected but not infested trees. You'll wait a reeeeeally long time if u want that kind of data.
 
Ontario Commercial Arborists Association -
Effects of Emerald Ash Borer on Material
Properties of Ash Trees

Location: Park Inn by Radisson
555 Cochrane Dr. Markham
Date: Thursday March 20, 2014
Time: 8am – 4pm (Lunch Included)
This one day session will discuss the effects of Emerald Ash Borer (EAB) infestation on the wood strength of ash trees. Infested ash loose wood strength quickly which makes safe removal challenging for sales and climbing arborists. Discussion will focus on how infested trees loose strength. Additionally, other factors affecting wood strength such as lightning strikes, mechanical injury, and insect problems will be discussed. This course will be taught by Anand Persad of Davey Institute.

http://www.isaontario.com/content/ocaa
 
Or.... If it doesn't have leaves when it should...... DON'T CLIMB IT!
That's free btw.
Best part of that course will most likely be lunch.
 
Kevin, thanks for re-posting this! It's getting more action this time.

Dr Persad's work is supposedly on the ISA web site, but I haven't found it yet (Haven't had time to look very hard either). I attended his session at ISA-Ont and as others have said it was pretty cool. One of the things that really stood out for me was in his opening remarks when he said the research had been prompted by observations of a higher number of accidents requiring hospitalization from calls on ash vs all other spp.

The anecdotal reports I had first heard were coming from Oakville and other areas of the GTA. It is entirely possible the trees were already infested and just not showing any signs yet. Anecdotal = short on detail, unfortunately.
 
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