Teratosphaeria cryptica (Cooke) Crous & U. Braun 2007

Type: Foliicolous Fungi; Description: Ascomata perithecial, closely aggregated, subepidermal, later partly erumpent, globose, black, up to 0.15 mm in diameter; on circular to irregular, discrete or confluent leaf spots which are variable in size. Asci obclavate to subsaccate, 32–45 × 10–15 μm. Ascospores ellipsoidal, 1-septate, 12–16 × 2.5–5 μm, rounded at both ends. Conidiomata acervular, subcuticular becoming erumpent, dark brown to black, up to 0.15 mm wide. Conidia cylindrical, straight or slightly curved, 0-septate, 9–18 × 4–6 μm, truncate at base with a small frill. Leaf spots occur on both sides of the leaves, are red brown in colour at first, frequently with a prominent purple margin, becoming dark grey with age; infected leaves are often distorted. The fungus also infects petioles and twigs, causing the formation of cankers up to 25 mm long, which often exude gum.

Distribution

Distribution: Northland, Auckland, Coromandel, Waikato, Bay of Plenty, Taranaki, Taupo, Rangitikei, Wanganui, Wellington, Gisborne, Hawkes Bay, Wairarapa, Nelson, Buller, Westland, Marlborough Sounds, Marlborough, North Canterbury, Mid Canterbury, Dunedin.; 1st Record: Weston (1957: as Mycosphaerella nubilosa).

Notes

Pathogenicity

Significance: The fungus can have a marked effect on growth and form of young trees, particularly in damp places such as gullies. Premature defoliation, cankering and dieback of shoots result in stunting, multileadering and the development of a bushy habit. Provenances of E. regnans show variability in susceptibility to infection (Wilcox 1982) and planting of resistant provenances can reduce the effects of the disease. In forest nurseries, fortnightly applications of fungicide have been found to give good control (Dick & Vanner 1986).; Host(s): Eucalyptus dalrympleana, E. delegatensis, E. dendromorpha, E. fastigata, E. fraxinoides, E. gunnii, E. nitens, E. obliqua, E. ovata, E. regnans.

Taxonomic concepts

Name

Cited name

Reference

Preferred name

Parent name

Colletogloeopsis nubilosum (Ganap. & Corbin) Crous & M.J. Wingf. 1997

Colletogloeopsis nubilosum (Ganap. & Corbin) Crous & M.J. Wingf.

Crous, P.W.; Braun, U.; Groenewald, J.Z. (2007)

Teratosphaeria cryptica (Cooke) Crous & U. Braun 2007

Colletogloeopsis nubilosum (Ganap. & Corbin) Crous & M.J. Wingf. 1997

Colletogloeopsis nubilosum (Ganap. & Corbin) Crous & M.J. Wingf. (1997)

Crous, P.W.; Wingfield, M.J. (1997)

Colletogloeopsis nubilosum (Ganap. & Corbin) Crous & M.J. Wingf. 1997

Colletogloeopsis nubilosum (Ganap. & Corbin) Crous & M.J. Wingf. (1997)

Pennycook, S.R.; Galloway, D.J. (2004)

Colletogloeum nubilosum Ganap. & Corbin 1979

Colletogloeum nubilosum Ganap. & Corbin

Crous, P.W.; Braun, U.; Groenewald, J.Z. (2007)

Teratosphaeria cryptica (Cooke) Crous & U. Braun 2007

Colletogloeum nubilosum Ganap. & Corbin 1979

Colletogloeum nubilosum Ganap. & Corbin (1979)

Dick, M.A. (1982)

Colletogloeum nubilosum Ganap. & Corbin 1979

Colletogloeum nubilosum Ganap. & Corbin (1979)

Ganapathi, A.; Corbin, J.B. (1979)

Colletogloeum nubilosum Ganap. & Corbin 1979

Colletogloeum nubilosum Ganap. & Corbin (1979)

Parke, R.F.; Keane, P.J. (1982)

Colletogloeum nubilosum Ganap. & Corbin 1979

Colletogloeum nubilosum Ganap. & Corbin (1979)

Parke, R.F.; Keane, P.J. (1982)

Mycosphaerella cryptica (Cooke) Hansf. 1956

Mycosphaerella cryptica (Cooke) Hansf.

Crous, P.W. (1998)

Mycosphaerella cryptica (Cooke) Hansf. 1956

Mycosphaerella cryptica (Cooke) Hansf.

Crous, P.W.; Braun, U.; Groenewald, J.Z. (2007)

Teratosphaeria cryptica (Cooke) Crous & U. Braun 2007

Mycosphaerella cryptica (Cooke) Hansf. 1956