Are aphids harmful to the whole tree?

A small number of aphids are usually harmless, but a large infestation can weaken the tree and cause leaf drop. It is best to manage them early.

Should I use chemical pesticides?

Avoid harsh chemicals, as they often kill beneficial insects that eat aphids. Stick to water sprays or insecticidal soaps first.

Why are my Striped maple leaves curling? Causes and fixes

Check these first

Examine the undersides of the curled leaves for tiny insects.
Check if the leaves feel sticky to the touch.
Observe if the leaves uncurl at night when it is cooler.

Likely causes

Aphids
Most likely
How to tell: You will see small, soft bodied insects clustered on the undersides of leaves or near new growth. The leaves may also feel sticky from the honeydew they secrete.
What to do: Spray the leaves with a strong stream of water to knock the aphids off. If they persist, apply insecticidal soap or neem oil directly to the undersides of the leaves every 7 days.
Heat stress
Possible
How to tell: The leaves curl inward during the hottest part of the day to conserve moisture. They usually recover once the sun goes down and temperatures drop.
What to do: Provide extra water during heat waves to keep the roots hydrated. If the tree is in a spot that gets too much direct afternoon sun, consider installing a shade cloth.

Curling leaves on other plants

Find out what's wrong with your striped maple

The list above covers the usual causes. Pocket Botanist looks at a photo of your actual plant and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.

When to worry

If the leaves stay curled even at night or start to turn brown, the tree is under significant stress. Temporary curling during a hot afternoon is usually normal.

Stopping it coming back

Keep the tree healthy with consistent watering, as stressed trees are more attractive to aphid colonies.

Striped maple: curling leaves? Check yours with a photo

Every plant is a little different. Take a photo of your striped maple and Pocket Botanist tells you which cause is most likely, how serious it is, and what to try first. A few checks a day are free. Save the plant and you get care reminders timed for it.

Get the app · Or check it from a photo now, free

Questions people ask

Are aphids harmful to the whole tree?: A small number of aphids are usually harmless, but a large infestation can weaken the tree and cause leaf drop. It is best to manage them early.
Should I use chemical pesticides?: Avoid harsh chemicals, as they often kill beneficial insects that eat aphids. Stick to water sprays or insecticidal soaps first.

Guides to these causes

Aphids

Why are my Striped maple leaves curling?

Check these first

Not sure what's wrong with your striped maple?