Will aphids kill my tree?

Usually no, but they can weaken it and cause unsightly leaf distortion. They also attract ants and promote sooty mold growth.

Yes, neem oil is effective against aphids. Apply it in the early morning or late evening to avoid burning the leaves in direct sun.

Why are there bugs on my Weeping Cherry?

Check these first

Inspect the undersides of new leaves for small clusters of insects.
Look for sticky honeydew or black sooty mold on the foliage.
Check the trunk for small holes or sawdust.

Likely causes

Aphids
Most likely
How to tell: You will see clusters of tiny green or black insects on new growth and sticky residue on leaves.
What to do: Spray the tree with a strong stream of water to knock them off. If they persist, apply insecticidal soap directly to the affected areas every 5 to 7 days.
Borers
Possible
How to tell: Look for small holes in the bark or sawdust like frass near the base of the trunk.
What to do: Keep your tree healthy with proper watering to help it resist attacks. If you find entry holes, consult a professional arborist as these are difficult to treat at home.

When to worry

A few aphids are manageable, but heavy infestations that cause leaf curling or branch dieback require immediate action. Borers are always a serious concern that can kill the tree if left untreated.

Stopping it coming back

Maintain tree vigor through consistent watering and avoid wounding the bark with lawn equipment. Beneficial insects like ladybugs help keep aphid populations low naturally.

Not sure which one it is? Photograph your weeping cherry.

This page lists the usual causes. Pocket Botanist looks at your actual leaf and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.

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Questions people ask

Will aphids kill my tree?: Usually no, but they can weaken it and cause unsightly leaf distortion. They also attract ants and promote sooty mold growth.
Can I use neem oil?: Yes, neem oil is effective against aphids. Apply it in the early morning or late evening to avoid burning the leaves in direct sun.