Part 1 Tsetse control - basic information with regard to its influence on the African environment: African trypansomoses and their vectors; present tsetse control measures. Part 2 Environmental monitoring - principles applied to tsetse control: basic principles and basic ecological data; general design of environmental monitoring programmes. Part 3 Effects and environmental fate of insecticides used for tsetse control: general effects; susceptibility of the target species; general toxicological and ecotoxicological information. Part 4 Techniques and equipment for environmental monitoring: monitoring of insecticide applications and of control operations with artificial attractive devices and livestock baits. Part 5 Results of environmental monitoring studies within the framework of tsetse control operations: side effects of residual and aerosol applications; side effects of accidental high contamination; side effects of artificial attractive devices and livestock baits; conclusions. Part 6 Planning and implementation of environmental monitoring: general considerations for the selection of appropriate monitoring techniques; implementation and schedule of environmental monitoring. Part 7 Guidelines for environmental monitoring: preventive measures to avoid or minimize environmental damage; remedial measures to deal with environmental damage; safety of pesticide handling; setting up of an eco-technical team; training in environmental monitoring.