Home > Question >

What is this black mould on the Pieris leaves?

Our Advice:

This sooty mould is usually caused by scale insects feeding on the underside of the leaves. Treat the plant with Bug Clear Ultra from Scott's or Provanto Ultimate Bug Killer from Bayer/SMB. Both act by killing the insects as they feed. Several applications may be required, and the sooty mould should gradually disappear.

This video may also help:

Here are some related questions:

Not what you are looking for?

If you can't find what you are looking for on the website then you can ask one of our experts. To get in touch with us Click Here

We will try to get back to you with an answer as soon as we can.

Here is some more information for you:

Did you find this answer useful? Subscribe to our newsletter for gardeing news, projects, special offers and competitions.

Ask another gardening question:

Learn More About Pests and Diseases

Gardening Projects for November

---

How to plant through weed-suppressing membrane

How to Protect Containers

How to plant a bare-root rose

How to Make a Bird Feeder

Latest Gardening Videos

---

Planting a Spring Flowering Container

Is it safe to compost rhubarb leaves?

How do I treat liverwort?

How to Grow Orchids

How can I stop my roses suffering from wind-rock?

How do I insulate my greenhouse?

All Videos

Explore Gardens from Around the World

Royal Botanic Garden Sydney
Sydney, Australia

Shinjuku Gyoen National Garden
Tokyo, Japan

Royal Botanic Gardens Victoria
Melbourne, Australia

Pamplemousses Botanical Garden
Pamplemousses, Mauritius

Villa d'Este Gardens
Tivoli, Italy

Powerscourt Gardens
Enniskerry, Co. Wicklow, Ireland