Home > Question >

The leaves of my runner beans developed and turned yellow, why?

Our Advice:

This is a bacterial disease called halo blight; always worse in wet weather because it is spread by water splashes. Spray with Copper Mixture from Vitax or Uncle Tom's Rose Tonic as soon as the spots are noticed. This disease is often seed-borne and worse with saved seed. The variety 'Red Rum' has a high tolerance to this disease.

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 January

---

How to Make a Bird Feeder

How to Propagate Mistletoe

How to pH Test Soil

How to take Hardwood Cuttings

Latest Gardening Videos

---

How do I protect container plants from the cold?

Five Essential Tips for Growing Lemons

Why are there brown / black marks on my Hellebores?

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

How to Grow Orchids

How do I insulate my greenhouse?

All Videos

Explore Gardens from Around the World

Nongnooch Tropical Garden
Pattaya, Thailand

Monet's Garden, Giverny
Giverny, France

Shinjuku Gyoen National Garden
Tokyo, Japan

Villa d'Este Gardens
Tivoli, Italy

Desert Botanical Garden
Phoenix, Arizona, USA

Medellin Botanical Garden
Medellin, Columbia