The Diagnostic Field Guide is a free eBook designed to support diagnostic decision-making. It shows the relationships between common symptoms on plants and the various possible causes.

Packed with images and tables of pests and the symptoms they cause, users can investigate the actual cause of any particular symptom that may be found in the field.

Plants can suffer from a variety of problems it is not possible for a person to be an expert on all problems of all plants. The Diagnostic Field Guide provides information relating to common symptoms expressed by crop plants when under attack from a wide variety of pathogens and pests as well as symptoms due to sub-optimal growing conditions.

The Field Guide assists the reader in linking the symptoms seen on plants with the potential causes. Where there is more than one potential cause it provides information on how to tease the two candidates apart so as to find the problem.