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Causes and Treatments of Aphids on Japanese Maples


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Aphids are small, soft-bodied insects that can cause serious damage to Japanese maples. Typically green or black in color, aphids feed on the sap of the tree and can often be found on the underside of the leaves. When an infestation is present, the leaves may yellow or discolor, and new growth can be stunted.

Aphids often find their way onto Japanese maples through a variety of different methods. Wind, birds, and other animals can carry them from one place to another. Aphids may also hitch a ride on other plants and then spread to the maple. Finally, aphids can be introduced to a maple tree through contaminated soil.

When dealing with an aphid infestation, it is important to take action quickly. The best way to do this is to use a combination of physical and chemical controls. In terms of physical control, it is crucial to regularly inspect the tree and remove any aphids that are discovered by hand. Horticultural oil, insecticidal soaps, and neem oil can also be used as chemical control and can be applied as needed.

Finally, an arborist can be consulted to determine the best way to treat an aphid infestation. An arborist will be able to assess the severity of the infestation and choose the most appropriate treatment. This may include pruning, spraying the tree with a systemic insecticide, or using beneficial insects such as ladybugs to eat the aphids.

In conclusion, aphids can cause serious damage to Japanese maples. To prevent and treat an infestation, regular inspection, physical and chemical controls, and the assistance of an arborist all play an important role. With proper care and attention, it is possible to keep a Japanese maple healthy and aphid-free.

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Comments

Jennifer Burt - January 22, 2026

You mentioned using an insecticidal soap spray to rid of aphids at Spring time as to not harm new growth using Neem or another stronger solution. I made th mistake of grabbing some large oak leafs and crumbling them up and laying them in my tiny small Waterfall pot and days later I see these aphids along with flying ones and ants so they came fast. I feel horrible. I have three trees and I’ve never seen any bugs on them. What do you suggest I use in late Fall?
The same treatment you mentioned for Spring? It’s the end of Nov and I live in Raleigh NC. Thank you for any advice.

Robyn Bartlett - October 20, 2025

I just read your comments about aphids on the Japanese Maple. I have these aphids on every tiny leaf of the fine leaf Maple. How can I possibly take them off by hand? Should I just spray them? I am worried about these trees. I would appreciate your advice. Thanks

Mark Thomas - January 21, 2025

What is the best way to get rid of Aphids from my Japanese Maple

Gail Castleberry - June 25, 2024

A limb was pruned from my Japanese maple tree and now it looks like where the limb was taken off there are black bugs inside the tree should I call an arborist. Is there a spray I can use I mean it looks like not sure

KB - June 12, 2024

Is neem oil safe to use on a Japanese Maple. There are conflicting opinions on this that it may be too strong and cause more harm than good.

Ron - May 23, 2024

Thanks Tim,

I just noticed these tiny green bugs which looks like the end of a blade of grass. Little triangly bugs.

If my description is reasonable, let me know so I can eradicate these pests properly.

I buy all my JM from you and Matt!

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