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Seed Capsule Abortion and Twig Dieback of Eucalyptus camaldulensis in South Florida Induced by Botryosphaeria ribis. R. S. Webb, Assistant Professor and Extension Forest Pathologist, School of Forest Resources and Conservation, University of Florida, Gainesville 32611. Plant Dis. 67:108-109. Accepted for publication 2 September 1982. Copyright 1983 American Phytopathological Society. DOI: 10.1094/PD-67-108.

A new disease of Eucalyptus camaldulensis (Spanish seed source) seed capsules and twigs was observed in three seed-production plantings in South Florida. Necrosis and abortion of colonized capsules prevented seed production in commercial quantities. Pathogenicity of Dothiorella eucalypti, a conidial stage of Botryosphaeria ribis, was established after isolation from symptomatic capsules, pedicels, peduncles, twigs, and leaf veins.