Fusarium wilt (Panama disease) caused by Fusarium oxysporum f. sp. cubense (Foc) is of economic importance in Kenya. The disease is widespread and currently causing havoc to bananas in the main growing regions of Eastern and Central Kenya. There is no information on the pathotypes associated with the spate of infections observed in these regions. This study was undertaken to identify the races of the pathogen involved and their pathogenicity on banana.