Global review of forest pests and diseases : a thematic study prepared in the framework of the Global Forest Resources Assessment 2005

Insect pests, diseases and other biotic agents have considerable impacts on forests. They can adversely affect tree growth, vigour and survival, the yield and quality of wood and non-wood products, wildlife habitat, recreation and the aesthetic appeal and cultural value of forests. They may also impede forest plantation programmes and make it necessary to abandon certain tree species or to clear cut large areas dominated by infested trees. This publication represents a rare effort to address forest pests and diseases comprehensively at the global level.