The most common and important insects, diseases, and other damaging agents of forest trees in the Canadian prairie provinces are described in terms of their symptoms and signs, distribution, hosts, disease (life) cycle, and damage. These are illustrated with colour photographs for easy identification. The book is divided into three major colour-coded sections: one for insects and diseases of conifers, one for insects and diseases of hardwoods, and one for other damaging agents. A host index listing pest species and disorders by host species and part of host affected, a glossary of technical terms, a general reference section, and a general index listing common and scientific names of hosts and pests as well as other damaging agents are also included.