Transcontinental Occurrence of Al and A2 Strains of Phytophthora Cinnamomi in Australia

Abstract

The fungus Phytophthora cinnamomi Rands is regarded as heterothallic with compatible mating strains designated Al and A2 (Gallegly 1970). Although the fungus has a world-wide distribution the Al strain has been reported only from North America and Hawaii (Galindo and Zentmyer 1964; Haasis, Nelson, and Marx 1964).