We also have many ash trees. If you live in the Midwest you probably know about the emerald ash borer that is killing ash trees. They believe the emerald ash borer entered this country embedded in a wooden pallet from China. Here in North America the emerald ash borer does not have any natural enemies and is free to multiple and kill ash trees in the Midwest.
You'll know if you have an emerald ash borer problem if you notice D shaped tiny holes in the tree trunk. Another sign is sections of dead branch at the end of a healthy branch. Sometimes you will also notice new growth coming out of large branches or on the trunk.
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The emerald ash borer problem is so urgent that they are collecting ash seed just in case all the ash trees are killed or damaged because of infestation. I know there was a homeowner, several years ago that had very old and very healthy ash trees on his property near Detroit. Authorities wanted to come in and cut all his trees down. I know he went to court but I am not sure what the out come was. This was several years ago before the Advanced Bayer treatment was available.
Here's a photo of the little ugly bugger.
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We decided to use Precision Tree Care to cut down 1 dead elm (thank you Dutch Elm disease), 1 very large half dead silver maple that was precariously close to power lines and the house, 1 large dead ash tree, and trim a black walnut limb that was hanging over the sun room and heading for the chimney. We decided to have the tree service just cut down the trees and we would cut the wood up to fireplace size and clean up the yard ourselves. We will save the elm and maple for the fireplaces and the rest of the wood will burned in the fire pit as soon as weather permits to keep any emerald ash borers from leaving the yard and infecting more trees.
One of the reasons you hire professionals such as Precision Tree Care is because they have the knowledge, experience, and tools to do the job correctly. As a journeyman myself, I have done my fair share of rigging but I was really impressed with how they rigged large tree limbs so that they could safely bring them to the ground without hitting the house, the hostas, or the rigger himself.