Maple canopy turned completely brown?

[SandMan]

Question....my sugar bush is up on the side of a ridge in a small ravine. I was traveling back from a farm on the next ridge and while I was looking back at my sugar bush I noticed a very brown maple in the middle of the ravine. On closer inspection, this is a 20-25" single trunk, full canopy sugar maple that appears to have no trunk damage, healthy looking bark (no bugs, scrapes, etc) and a full canopy that has turned completely brown???? I have plenty of marginal trees, but this was definatly not one of them. The tree looks perfectly fine with the exception of all the leaves turning a crisp brown. Also, there are no other tree's in this ravine that have "turned" like this???? I've tapped this tree twice and both tap holes have (or are) healing fine. Any thoughts??? I've marked the tree and won't tap it this year....see what it looks like next spring. As a side note, we've had some pretty impressive lightning storms recently...I do not see any burn marks! Any one have any thoughts????

Thanks in advance.....

[maple flats]

How dry has it been there. I haven't heard of it in maples but I wonder. I had in my blueberries some similar brown. I found it on the bushes in lower lying areas of the fields. My theory is that they developed less of a root system because the always "have moisture" Then a drought hit and the shallowest rooted ones suffered browning of the leaves while bushes on higher ground fared OK. My elevation difference over my 4.5 acres of blueberries is only about 1.5' max.
I wonder if you had something similar. Too few fine root hairs to take up moisture?
Dave

[Maple Hill]

Even in a normal year it is the weaker or most stressed trees that turn color first.

[maple flats]

I expect this will not kill the tree, but it may be best to skip that ftee for next season to let it rest and recover. A tree when stressed too much will shut off it's leaves when the leaves are a negative for the tree, such as they lose more moisture than the tree can support from ground moisture. This is a protective mechanisim to insure the life of the tree.

[sugaringman85]

I can come take a look at it at some point mike if your really concerned. could be drought issues, and has the potential to send out a second flush of leaves again or it did get hit by lightning. Usually if hit it blows the tree up pretty good

[heus]

Here in NE Ohio I have seen many sugar maples along the roads with completely dead and crunchy leaves. I believe it is due to lack of water. There are some sugars in my yard that have entire branches with completely dead leaves. The entire branch is dead from what I can tell. These are not leaves turning color early, they are simply suddenly dead. I think wherever you see leaves like this, that entire branch is dead. If the whole tree is like that, Im afraid its pretty much a goner. The trees in my woods look fine.

[DrTimPerkins]

Here in NE Ohio I have seen many sugar maples along the roads with completely dead and crunchy leaves.

Trees on edges of fields and along roads are more exposed to wind and sun, so experience a higher evapotranspirational demand (they need more water). Thus you'll see water stress symptoms on them sooner than you will on other trees.

In addition, in areas that use road-salt, the salt increases the osmotic potential of the water, and can interfere with root growth, both of which will impact the trees ability to take up water.

In general, roadside and field edge trees aren't the best indicators of the general health of the forest proper....unfortunately they are easy to see though, so folks often assume all the interior woods trees wil be the same.

Drought, if severe and prolonged can lead to mortality of maple trees, although it usually takes some time to manifest itself.

[RC Maple]

Do you think then that the trees - if only in their first year of drought stress - are just shutting the leaves down for the season? We had saturated soils around here until March of April. Should the trees with browning leaves be noted and not tapped for 2013?

[AdirondackSap]

I too have noticed branches on some of my maples with dead brown leaves. It is weird bc its only on certain trees and others right next to them are very healthy with green leaves. We have had a lack of rain in upstate NY so i think its a combination of drought and sun exposer. While other maples are so healthy soaking up up the sun i think it could have to do with moisture in the ground. I have also seen riding down the road healthy looking maples with a big green crowns with one branch that all the leaves turned brown but havent fallen off any one with ideas what could be going on?

[Sunday Rock Maple]

Do the leaves have holes in them like they were shot with BB's? We had that a few years ago and the whole 40 acre bush turned brown in August. I can't remember what the name of the bug was (maple leaf borer and/or pear thrip come to mind but I could be out to lunch on that).

[RC Maple]

The trees that I'm seeing just have parts of the leaves that have turned brown and look dead. I haven't noticed any feeding holes in the leaves but will keep an eye out for that.