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 December

---

How to: Maintenance Pruning

How to Protect a Climber

How to Make a Bird Feeder

How to Propagate Mistletoe

Latest Gardening Videos

---

Growing Geraniums

Five Essential Tips for Growing Lemons

How do I protect container plants from the cold?

How do I insulate my greenhouse?

How to Grow Orchids

Why are there brown / black marks on my Hellebores?

All Videos

Explore Gardens from Around the World

Eram Garden
Shiraz, Iran

Koishikawa Korakuen Gardens
Tokyo, Japan

Dubai Miracle Garden
Dubai, United Arab Emirates

Royal Botanic Gardens, Kew
Richmond, United Kingdom

The New York Botanical Garden
New York, United States

Lalbagh Botanical Garden
Bangalore, India