Abstract
Abstract Fungal isolations were made from Coprosma spp. exhibiting symptoms of shoot die-back, stem cankers, and anthracnose at several sites in the Auckland area. Fungi belonging to 14 different genera were isolated, and isolates from the four genera Fusarium, Phoma, Pestalotiopsis, and Colletotrichum were tested for pathogenicity against Coprosma robusta Raoul, and C lucida J. R. et G. Forst. An isolate identified as a form of Colletotrichum coffeanum Noack was shown to be a primary pathogen causing anthracnose of leaves, fruits and branches, and eventual dieback. Fusarium isolates were shown to produce stem cankers and leaf spots in previously wounded tissue. Phoma and Pestalotiopsis were also shown to produce leaf infections in previously wounded leaves but were considered to be of secondary importance. In laboratory experiments there was no significant difference in susceptibility between Coprosma robusta and C. lucida to any of the fungi tested.
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