Fox R. The Gardener’s Book of Pests and Diseases: The Complete Diagnostic Guide

Batsford, 2005. — 160 p. — ISBN: 9781849942225.The most invaluable gardening tool of all: if you want to know what’s going on — and what’s going wrong — in your garden, this guide to maintenance, prevention, and dealing with pests and diseases will tell you.
It includes advice on recognizing plant diseases, interpreting the symptoms, and keeping a healthy garden. An entire section focuses on individual problems.