I have a lace maple in a container on which some of the leaves are drying and seem to be dying. The trunk is darkening on the affected areas but I don't see any signs of pests. I live in Seattle but am not sure of my zone. I would appreciate any help you can give me.
It sounds like sooty mold.
Here is a link with more information.
https://www.gardeningknowhow.com/plant-problems/disease/how-to-get-rid-of-sooty-mold.htm
https://www.gardeningknowhow.com/ornamental/trees/japanese-maple/japanese-maple-problems.htm
I think it's a Norway - Sporadic branches did not produce any leaves this year. I had one branch last year but have many more this year. Neighbor's maple doing the same thing. Neighbor's tree started a year before my tree. Couldn't find any disease that matches up with these conditions.
It sounds as if it is Maple Wilt. Common in the Norway Maple.
Here is a link about it.
http://learningstore.uwex.edu/assets/pdfs/A2537.pdf
https://www.gardeningknowhow.com/ornamental/trees/maple/maple-tree-bark-disease.htm
I have brown spots on the trunk of my Silver Maple and Arizona Ash. They do not look under any stress. Both were planted this past spring. Any advice?
I have not been able to determine a cause from your description.
Here is a link.
Review the article and see if any other symptoms can be see in your trees.
https://www.gardeningknowhow.com/ornamental/trees/maple/maple-tree-bark-disease.htm
I have a maple tree that is about 15 years old. The bark near the bottom was lost several years ago. The area is an oval about 1 foot high by about 8 inches across at the widest point. It reaches about 1/4 the way around the trunk. The tree appears healthy but I was wondering if there is something I should do to the tree or if it's too late?
As long as the tree is still healthy, you probably have nothing to worry about and may not need to do anything for it. However, this article may offer some suggestions to help you: https://www.gardeningknowhow.com/ornamental/trees/tgen/repairing-tree-bark-damage.htm
I have hundreds of maple seed pods that are now growing as small trees in my flower beds. I live in northeast Ohio, have never had this many seed pods since I have lived here. Now they are growing in all my flower beds, to the point where it is impossible to pull them all. Any suggestions on how to eliminate them? I tried raking the mulch but there are way too many of these growing. Any spray that I can use that will eliminate these and not kill my plants growing in the beds?
Since I have the same issue in my own yard and garden, I understand the work involved. Unfortunately the only way is to hand clean the seed pods and pull up the little seedlings.
If it is just rooting in your mulch, away from any plant material, you could spot treat with a herbicide or a natural weed killer. You would need to use extreme caution as it will kill everything.
https://www.gardeningknowhow.com/special/organic/homemade-pet-friendly-weed-killer.htm
https://www.gardeningknowhow.com/ornamental/trees/tgen/weed-trees.htm
Recently, one huge branch broke off and we removed it. The tree has been pruned in a way that all of the main branches are on one side of the tree. Also, when I removed the branch, there was a dark red ring within the wood. Does this mean the tree has some sort of disease? It looked like the branch rotted and then broke away. The tree is about 45 ft tall and is about 40 years old.
The safety and health of a tree is best determined by a professional arborist.
Perhaps the tree could be pruned to a more eye appealing shape.
The dark red ring you mention may be nothing more than a normal growth ring.
Our variegated maple drops tiny sticky deposits on cars parked beneath it. The leaves look quite shinny and are slightly sticky. Is this something that can be treated?
Maples are susceptible to the cottony maple scale, which sucks the moisture out of the leaves and excretes a sticky substance called honeydew.
This can attract black mold. The best way to treat this is to apply a systemic insecticide applied to the soil.
https://www.gardeningknowhow.com/plant-problems/pests/insects/control-plant-scale.htm