Are these bugs harmful to my other plants?

Leafhoppers can move to other garden plants, so it is best to treat the infestation quickly. Keep an eye on nearby shrubs for similar yellow spots.

Do I need to use harsh chemicals?

Usually, insecticidal soap or neem oil is enough to handle these pests. Avoid broad spectrum pesticides that might kill beneficial insects.

What is eating my Rhododendron leaves? Causes and fixes

Check these first

Look for tiny insects on the undersides of leaves.
Check the leaf edges for notches.
Shake the branches gently to see if anything flies off.

Likely causes

Rhododendron Leafhopper
Most likely
How to tell: These small, wedge shaped insects feed on the undersides of leaves, causing yellow spots or stippling on the top surface. You might see them jump when you disturb the branch.
What to do: Spray the undersides of the leaves with insecticidal soap or neem oil. Repeat the application every 7 to 10 days until the insects are gone.
Vine Weevil
Possible
How to tell: This is less common for this plant, usually caused by larvae feeding on the roots while adults chew notches in the leaf edges. Look for irregular, notched edges on the foliage.
What to do: Apply a biological control like nematodes to the soil to target the larvae. For adults, you can hand pick them at night with a flashlight.

Pests on other plants

Find out what's wrong with your pontic rhododendron

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

Worry if you see significant leaf drop or if the plant looks stunted. A few insects are manageable, but a heavy infestation can weaken the shrub.

Stopping it coming back

Keep your plant healthy with proper watering and mulch to discourage pests. Regularly inspect the foliage during the growing season.

Pontic rhododendron: pests? Check yours with a photo

Every plant is a little different. Take a photo of your pontic rhododendron 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.

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Questions people ask

Are these bugs harmful to my other plants?: Leafhoppers can move to other garden plants, so it is best to treat the infestation quickly. Keep an eye on nearby shrubs for similar yellow spots.
Do I need to use harsh chemicals?: Usually, insecticidal soap or neem oil is enough to handle these pests. Avoid broad spectrum pesticides that might kill beneficial insects.

Guides to these causes

Vine Weevil

What is eating my Rhododendron leaves?