Is a bacterial infection specific to horse chestnuts and both the re and white flowered types are affected. If the canker girdles the tree, it dies.
Cracks in the bark on stems and trunks of affected trees, and a sticky, rusty looking liquid oozing from them. Dead sections of bark will fall away exposing the wood and reveal a brown or purple discoloured area of inner bark. Gradually the infection causes crown thinning, die-back and even death of part or all of the tree. Cankers can be seen at any time of year.
Now you know what the problem is, and the damage it is doing, don't let your plant suffer.
For specific problems try one of our specialists...
You can use a Plant Specialists to help you diagnose pests and diseases that affect specific plants. If there is not a Plant Specialist for your type plant then use the Plant Doctor
Diagnose pest and disease problems with your orchids
Diagnose pest and disease problems with soft fruit.
Diagnose the type of soil you have and learn which plants will grow well in your garden.
Diagnose pest and disease problems with fruit trees and bushes.
Use an Interactive Gardening Tool to help plan your garden, maintain your plants more effectively or learn about different garden pests or plant diseases.
Learn which plant pests attack which types of fruit.
Learn when and how to prune different types of plants
Done soil test? Acid or alkali - Learn which plants will grow in your soil
Learn when and how to plant different vegetable seeds