My silver maple has anthracnose and I had an arborist drop by to confirm. She had mentioned she could spray with neem oil. While I was out of the house, they sprayed the tree, but I see no signs [visual/odor] that the tree had been sprayed. Should neem oil leave some signs on the leaves, as I smell or see nothing?
It does not have too much in the way of smell, and because it works systemically from within the tree, not very much is needed to control any pests. It is normally sprayed on in a watered down solution to cover the plant and then the water evaporates, while the neem oil is absorbed into the tree. It is very possible that you would see nothing on the tree if it had had a few hours to dry.
While it is primarily used as an insecticide, it is also an excellent fungicide, so it is effective against anthacnose, which is a fungus. Neem oil is an all round, near perfect spray for plants as it combats a wide variety of problems.
Last fall we transplanted a young red maple tree. In the spring, leaves bloomed on less than 1/3 of the tree. Some branches look like they are dead. Any way to rejuvenate the tree?
This article will help determine if the tree is dead: https://www.gardeningknowhow.com/plant-problems/environmental/how-to-tell-if-a-plant-is-dead-and-how-to-recover-an-almost-dead-plant.htm
This happened to ours. All I did was prune down the branch until I hit "good" wood, then walked away. It's fleshing out beautifully. Prune it now, in spring.
If I tapped the maple trees in the spring, would this reduce or stop the sap from dripping from the leaves? This year it has been the worst I have seen it in twenty years.
I would simply leave it alone, unless you want to make some syrup from it. Typically, trees such as maples will "bleed sap" in the spring from openings or wounds in the aerial parts of the tree. Once the foliage elongates, the sap usually stops flowing.
I have an 8-year-old maple that is growing beautifully. Unfortunately, I noticed a limb has split but has not broken off. I used rope to support the damaged limb but need a more permanent fix. Would it be acceptable to use large wood screws and screw the limb back together? The limb is about 2-3 inches in diameter and has split down the middle.
Yes, you can try this. If possible, do not drill through the very center of the branch, but rather on the sides of the heartwood.
Would like to plant some trees in containers. Particularly the Amur Maple. What size container would be suitable for this tree on a deck?
These articles may help:
https://www.gardeningknowhow.com/ornamental/trees/tgen/growing-trees-in-containers.htm
https://www.gardeningknowhow.com/special/containers/how-to-grow-container-trees.htm
I have a huge maple tree in my yard which is dying. What could possibly cause one to die?
There are many things that could kill the tree - everything from a virus to fungus to pests. It is best to have a local arborist look at the tree to diagnosis exactly what the issue is.
Are my maple trees dying? They have bark that is falling off. I have two maple trees that are about 3 to 5 years old and they now are showing some bark damage and look like they are slowly rotting away. I see a few more similar in my neighborhood, some are leaveless -- one individual has a black plastic bag around the base (duck taped over the spots). Is there anything I can do to save/repair mine? I have attached a link to some pictures of the two trees. I didn't notice the bark spot until this year and the leaves are starting to brown as well. To veiw pictures just paste this link: https://picasaweb. google.com/107731967818540907621/SicklyMapleTree?authkey=Gv1sRgCNWk8rzJ2rmaVg&feat=directlink Thanks, Mark
It looks like canker, but there are several kinds of canker it could be. This article outlines the most common:
https://www.gardeningknowhow.com/ornamental/trees/maple/maple-tree-bark-disease.htm
With most tree diseases, it is best to have a professional come and look at it as they can be difficult to diagnose without seeing the tree in person.