VIEW ARTICLE

Letter to the Editor

Estimating Relative Fitness in Plant Parasites: Some General Problems. John A. Barrett, Research associate, Department of Genetics, University of Cambridge, Downing Street, Cambridge, CB2 3EH, England, Present address: Department of Genetics, The University of Liverpool, P.O. Box 147, Liverpool, L69 3BX, England; Phytopathology 73:510. Accepted for publication 19 August 1982. Copyright 1983 The American Phytopathological Society. DOI: 10.1094/Phyto-73-510.