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Longer people let them sit Dead, the higher the price goes up.Where I am, EAB showed up a couple years ago. We're starting to see it spread, but slowly. I feel like any day it will be seen everywhere. I can read about the signs, etc., but I'm curious what arborists, in the field, think about working with infested trees.
I didn't see any of the criss cross patterns. Do you think the markings between the rings would be a sign of past activity from a cambium miner?For Seedy J and those myriad small wounds. I'd start with cambial miner, an agromyzid fly like Phytobia or some such. Native pest on a number of northern hardwoods.
True, the cold winters here can be slowing the spread.Seedy J, in Winnipeg you may be far enough north to never have the complete devastation we have seen around here. I think I've read that if you get a few days of continuous "colder than 25 degrees below zero F" it will kill off most of the buggers, and the trees can survive. If that happens at least once every few years, the bugs stay sort of under control. Anybody else agree or disagree with that?
You can disagree all you want but my experience says different. EAB has come and gone in my area 95% + ash gone. I personally have been in on 1600 ash tree removals. Counted by the head of grounds at a golf course in Fontana WI. !00's of semi truck log loads and many 1000's of yards of chips. But that's cool take it or leave it.More than 20% decline from EAB and we consider them to hazardous to climb without a anchor point isolated from the tree. Any rigging is accompanied, by an extensive hazard assessment and plan.
I strongly disagree with flushcut. In my experience the greatest hazard they pose is the unpredictability at any time after they are infected. Once a tree or section is dead, it is much more likely to be substantially weaker than normal.
Tony
There was a paper about that from Minnesota a few years ago. The bugs die when they get that cold. However...they are in the tree and insulated, so they don't get that cold too easily. They tested the bugs outside of the tree.Seedy J, in Winnipeg you may be far enough north to never have the complete devastation we have seen around here. I think I've read that if you get a few days of continuous "colder than 25 degrees below zero F" it will kill off most of the buggers, and the trees can survive. If that happens at least once every few years, the bugs stay sort of under control. Anybody else agree or disagree with that?
Yep true, we had some -30 to -40 C temps a few winters back that lasted 4-5 days in a few different times in the winter, and they had that theory also about the cold but nope they still came out strong in the spring here.There was a paper about that from Minnesota a few years ago. The bugs die when they get that cold. However...they are in the tree and insulated, so they don't get that cold too easily. They tested the bugs outside of the tree.
Could that be a site factor? I have seen the opposite around here... But we are pretty wet heavy soils where green ash is going to do much better than white ash. What are soils like where you are?Anyone else notice white ash, even right next to a green ash seem to be a few years behind as far as die back goes? I’ve consistently seen this, are there any reasons/theories on that?