Photo 1. Small, irregular spots 1-2 mm, on a capsicum leaf, brown at first, later maturing to light grey with brown border.
Photo 2. Close-up of a single spot showing the pycnidia (black dots) which contain large numbers of spores.
Photo 3. Large expanding spots on a mature capsicum fruit showing showing masses of spores that have discharged from the round spore-containing pycnidia.
Phoma species; commonly Phoma exigua. It was previously known as Ascochyta phaseolorum. It has been renamed Boeremia exigua var. exigua.
AUTHOR Grahame Jackson
Photos 1&2 Jacqui (Wright) Kami, formerly Plant Pathologist, Secretariat of the Pacific Community, Suva, Fiji. Photo 3 Phoma pycnidia Bruce Watt, University of Maine, Bugwood.org. Photo 4 Phoma sp. Division of Plant Industry Archive, Florida Department of Agriculture and Consumer Services, Bugwood.org.
Produced with support from the Australian Centre for International Agricultural Research under project PC/2010/090: Strengthening integrated crop management research in the Pacific Islands in support of sustainable intensification of high-value crop production, implemented by the University of Queensland and the Secretariat of the Pacific Community.
This mini fact sheet is a part of the app Pacific Pests, Pathogens & Weeds
The mobile application is available from the Google Play Store and Apple iTunes.