Will aphids kill my plant?

A light infestation won't kill it, but a heavy one can weaken the plant significantly. It is best to treat them as soon as you see them.

Do I need to use harsh chemicals?

No, you should avoid harsh chemicals. Water sprays and insecticidal soaps are usually enough to handle the problem.

What are these bugs on my Broadleaf Plantain?

Check these first

Look closely at the new growth and the undersides of leaves.
Check for sticky residue on the leaves or the surface below the plant.

Likely causes

Aphid infestation
Most likely
How to tell: You will see tiny green or black insects clustered on the stems or undersides of leaves. They often leave behind a sticky residue called honeydew.
What to do: Spray the plant with a steady stream of water to knock the aphids off. If they persist, apply insecticidal soap or neem oil every 5 to 7 days.

When to worry

It is serious if the leaves start to curl or turn yellow from the sap loss. A few aphids can be managed easily with a quick rinse.

Stopping it coming back

Check your plant weekly for early signs of pests. Keeping the plant healthy and in full sun makes it less attractive to aphids.

Not sure which one it is? Photograph your greater plantain.

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 plant?: A light infestation won't kill it, but a heavy one can weaken the plant significantly. It is best to treat them as soon as you see them.
Do I need to use harsh chemicals?: No, you should avoid harsh chemicals. Water sprays and insecticidal soaps are usually enough to handle the problem.