Mr Barter said the trees were under threat from the spread of the chestnut leaf mining moth and chestnut bleeding canker.

BBC: Conker match world record smashed at RHS Wisley

This cynicism is the canker in the body of British democracy itself.

ECONOMIST: From the archive

The researchers screened several drugs and found that amlexanox, used in an ointment to treat canker sores, changed the action of genes that control metabolism.

CNN: STORY HIGHLIGHTS

They then injected the animals with a drug called amlexanox, which has been on the market for more than 15 years to treat canker sores.

CNN: STORY HIGHLIGHTS

How that was achieved, and how Harling knew he was walking into a police trap were gnawing questions that ate at their collective consciousness like a canker.

CNN: Books - Excerpt: 'Flint'

The Brazilian citrus growers' association, which helped to finance the project, is now offering to pay to decode the bug that causes another serious disease, citrus canker.

ECONOMIST: Brazilian science

It's a little disease called the citrus canker.

NPR: The Marketplace Report: Greenspan's Successor