Are these bugs going to kill my plant?

Lace bugs rarely kill a healthy rhododendron, but they can make it look very unattractive and reduce its vigor. It is best to treat them as soon as you spot them.

Do I need to use harsh chemicals?

No, insecticidal soaps and horticultural oils are usually very effective and much safer for the environment. Always follow the label instructions.

What are the bugs on my rhododendron? Causes and fixes

Check these first

Look at the undersides of the leaves with a magnifying glass.
Check for fine webbing between the stems.
See if the leaves have a stippled or speckled look.

Likely causes

Lace bugs
Most likely
How to tell: The leaves look stippled or bleached on top with tiny black spots on the underside. These bugs suck the sap and leave the foliage looking sickly.
What to do: Use a strong stream of water to wash the undersides of the leaves. If the infestation is heavy, apply insecticidal soap or horticultural oil every 7 to 10 days.
Spider mites
Possible
How to tell: You might see fine webbing between leaves or stems and a dusty appearance on the foliage. The leaves may turn yellow or bronze over time.
What to do: Increase humidity around the plant and wash the leaves with water. Use neem oil if the population persists.

Pests on other plants

Find out what's wrong with your 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

Treat the plant if you see visible damage or a large number of insects. A few bugs are usually manageable, but a heavy infestation can weaken the plant significantly.

Stopping it coming back

Keep the plant healthy with proper watering and mulch, as stressed plants are more attractive to pests.

Rhododendron: pests? Check yours with a photo

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

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

Questions people ask

Are these bugs going to kill my plant?: Lace bugs rarely kill a healthy rhododendron, but they can make it look very unattractive and reduce its vigor. It is best to treat them as soon as you spot them.
Do I need to use harsh chemicals?: No, insecticidal soaps and horticultural oils are usually very effective and much safer for the environment. Always follow the label instructions.

Guides to these causes

Spider Mites

What are the bugs on my rhododendron?