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Physiologic Specialization and Sources of Resistance to Wheat Leaf Rust in Kenya. D. E. Harder, Assistant Professor, University of Manitoba, Canada Department of Agriculture, 25 Dafoe Road, Winnipeg 19, Manitoba; Phytopathology 61:1201-1204. Accepted for publication 14 May 1971. DOI: 10.1094/Phyto-61-1201.

Leaf rust of wheat is widespread in the low- to middle-altitude wheat-growing areas of Kenya. Two distinct physiologic races were identified using host differentials suited to the local leaf rust population. Race EAL 1 predominated, and together with EAL 2 comprised all the virulence found in leaf rust in Kenya. Most of the commonly used Kenya wheat cultivars are susceptible to one or both of the dominant races, but some excellent sources of resistance are available.

Additional keywords: Puccinia recondita.