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Go to the NZFungi website for more indepth information on Diplocarpon rosae. Diplocarpon rosae


Marssonina rosae
Actinonema rosae
Asteroma rosae


Present in region - Exotic

Article: Dingley, J.M. (1969). Records of plant diseases in New Zealand. New Zealand Department of Scientific and Industrial Research, Bulletin 192: 298 p. Wellington:.
Notes: Black spot on roses is a common disease throughout the country (Ellis (1952a); Marcussen (1962); and Amos (1963) ). Heavy infection causing considerable defoliation in summer seriously weakens the plants. The disease is important in commercial plantings. Sprays of captan and folpex have been recommended for control of this disease.

Article: Gadgil, P.D. (in association with Dick, M.A.; Hood, I.A.; Pennycook, S.R.) (2005). Fungi on trees and shrubs in New Zealand. Fungi of New Zealand. Ngā Harore o Aotearoa 4: xi + 437 p. Hong Kong: Fungal Diversity Press.
Description: Type: Foliicolous Fungi; Description: Conidiomata acervular, scattered, subcuticular, erumpent, oval to elliptical, brown; on circular dark brown to black leaf spots with ragged margins, up to 15 mm in diameter, on upper surfaces of leaves. The black colour is due to a dense subcuticular network of dark hyphae. Conidia oval to elliptical, 1-septate, 20–25 × 5–6 μm, smooth, hyaline.
Distribution: Distribution: Auckland, Waikato, Bay of Plenty, Taranaki, Taupo, Wanganui, Wellington, Nelson, North Canterbury, Mid Canterbury, Chatham Islands.; 1st Record: Kirk (1901: as ‘black spot’).