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Japanese Mock Orange · Pittosporum tobira

Why are there white, fuzzy things on my Japanese Mock Orange?

Seeing white, cottony patches on your plant usually means you have a scale infestation. These pests suck sap and weaken the shrub, so you should inspect the stems and leaf undersides right away.

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pests on a plant
Photo: Jules Verne Times Two, CC BY-SA 4.0

Check these first

  1. Inspect the undersides of leaves for tiny insects.
  2. Check the stems for white, waxy deposits.
  3. Look for sticky residue on the foliage.

Likely causes

  1. Cottony Cushion Scale

    Most likely

    How to tell: You will see white, waxy, egg-filled sacs attached to the stems or leaf veins. The plant may also look sticky from the honeydew they secrete.

    What to do: Dab the visible insects with a cotton swab soaked in rubbing alcohol. For larger infestations, spray the entire plant with horticultural oil or neem oil every 7 to 10 days until they are gone.

  2. Aphids

    Possible

    How to tell: Tiny green or black insects cluster on the tender new growth at the tips of branches. They cause the leaves to curl and look distorted.

    What to do: Blast the pests off with a strong stream of water from your garden hose. If they persist, apply insecticidal soap directly to the affected areas once a week.

Pests on other plants

Find out what's wrong with your japanese mock orange

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.

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When to worry

If the plant is covered in sticky honeydew or shows signs of stunted growth, take action immediately. A few stray insects are easy to manage, but a full colony can kill a young plant.

Stopping it coming back

Keep your plant healthy with proper watering and prune for good air circulation. Regularly inspect new growth during the spring when pests are most active.

Japanese Mock Orange: pests? Check yours with a photo

Every plant is a little different. Take a photo of your japanese mock orange 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

Will these pests kill my plant?
If left untreated for a long time, yes. They drain the plant of nutrients and can lead to secondary fungal issues.
Can I just wash them off?
Yes, a strong spray of water is often enough to control minor aphid outbreaks. For scale, you usually need to follow up with oil treatments.

Guides to these causes

More problems with Japanese Mock Orange

Back to the Japanese Mock Orange guide

This article was generated with AI on from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.