Home > Question >

What is causing brown, dead patches on my leylandii hedge?

Our Advice:

This is cypress aphids, which cause brown patches of dead foliage but, before this, you may see yellow mottling on shoot tips to indicate that insects are actively feeding. Spray both areas with Bayer Greenfly Killer'>Greenfly Killer from Bayer or P Y Garden Insect Killer Spray from Vitax.

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 October

---

How to clean your pots

How to Store Apples

How to lift Dahlias

How to care for your Greenhouse

Latest Gardening Videos

---

Five Essential Tips for Growing Lemons

How to Take Care of Spring Flowering Bulbs

Digging Up Sweet Potatoes

When is the best time to prune my bottle brush plant?

How can I get rid of a red ant nest in my lawn?

How do I treat liverwort?

All Videos

Explore Gardens from Around the World

Eram Garden
Shiraz, Iran

Humble Administrator's Garden
Suzhou, China

Pamplemousses Botanical Garden
Pamplemousses, Mauritius

Pukekura Park
New Plymouth, New Zealand

RHS Harlow Carr
Harrogate, United Kingdom

Butchart Gardens
British Columbia, Canada