My Japanese Red Maple is sick

Asked April 29, 2020, 6:25 PM EDT

My 45 year old Japanese Red Maple is experiencing curled leaves and some branches where the leaves have not emerged at all. What are the possible cures available. It's a big tree , about 15 feet tall.
I have Malathion in stock. When you decide what is ailing my tree, would this work to com bat it. Also, will it spread. We have approximately 75 Japanese Red Maples, all progeny of this tree, around the property and do not want this to spread. Thanks

Howard County Maryland

2 Responses

The light brown/beige spots on the leaves are caused by cold damage. Many plants were lured out of dormancy and then hit with frosts and cold this spring. This is how it presents the damage on this particular species.

The curled leaves may be a result of cold damage. Uncurl them and look inside. You may see some insects, probably aphids. If so, this is a temporary situation because predator insects will take care of the aphids. (Cold slows down the build up of predator insect populations.)

The curled leaves could also be a result of herbicide use in the area, particularly 24-D spray. This chemical is often blown onto non-target plants when used incorrectly on a breezy day.

Malathion is an insecticide, a very strong one. We do not suggest you use it. (It would not be helpful in this situation. )

You may want to recycle it at your local landfill on a recycle day for toxic chemicals.

Ellen


The light brown/beige spots on the leaves are caused by cold damage. Many plants were lured out of dormancy and then hit with frosts and cold this spring. This is how it presents the damage on this particular species.

The curled leaves may be a result of cold damage. Uncurl them and look inside. You may see some insects, probably aphids. If so, this is a temporary situation because predator insects will take care of the aphids. (Cold slows down the build up of predator insect populations.)

The curled leaves could also be a result of herbicide use in the area, particularly 24-D spray. This chemical is often blown onto non-target plants when used incorrectly on a breezy day.

Malathion is an insecticide, a very strong one. We do not suggest you use it. (It would not be helpful in this situation. )

You may want to recycle it at your local landfill on a recycle day for toxic chemicals.

Ellen