For a long time, trypanosomosis, spread by the tsetse fly Glossina, constrained human
settlement in the Lambwe Valley, a south-western Kenya rangeland. After lengthy efforts to
control tsetse over many years, the valley is currently experiencing an increase in human
population growth rate, and rapid changes in land-use and cover are taking place. Using
time-series aerial photograph interpretation, social survey methods, and a review of human
population trends over five decades, a three-fold expansion in cultivation in the settled areas …

For a long time, trypanosomosis, spread by the tsetse fly Glossina, constrained human
settlement in the Lambwe Valley, a south-western Kenya rangeland. After lengthy efforts to
control tsetse over many years, the valley is currently experiencing an increase in human
population growth rate, and rapid changes in land-use and cover are taking place. Using
time-series aerial photograph interpretation, social survey methods, and a review of human
population trends over five decades, a three-fold expansion in cultivation in the settled areas …