: Using a visual sampler of common damage types like leaf spots or wilting.
The Encyclopedia of Natural Insect & Disease Control: The Most Comprehensive Guide to Protecting Plants--vegetables, Fruit, Flowers, Trees, and Lawns--without Toxic Chemicals
This encyclopedia serves as a "first aid kit" for gardeners. It was written by experts Pippa Greenwood and Andrew Halstead to help hobbyists and professionals alike identify and treat plant ailments without immediately reaching for toxic chemicals.
: Looking up specific vegetables, fruits, or flowers to see their most likely "enemies".
The reference you're looking for is most likely the , published in collaboration with the Royal Horticultural Society (RHS) . The Story Behind the Book
The guide is designed for high-speed diagnostic accuracy, allowing you to identify a problem in three distinct ways: