Calonectria pauciramosa

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Calonectria pauciramosa (= Calonectria polizzii) - A–E) macroconidiophores, F–L) conidiogenous apparatus with conidiophore branches and doliiform to reniform phialides, M–P) obpyriform to ellipsoid vesicles, Q–R) one-septate macroconidia - scale bars = 10 μm (click on image to enlarge it)
Author(s): L. Lombard, P.W. Crous, B.D. Wingfield and M.J. Wingfield
Source: Studies in Mycology (2010) 66, p. 26

Calonectria pauciramosa C.L. Schoch & Crous 1999

This fungus causes leaf spot diseases, stem cankers as well as crown- and root rots on ornamentals and other crops. For example, it has been described (as Calonectria polizzii) to affect ornamental nurseries in Italy (e.g. see Guarnaccia et al., 2014). Calonectria polizzii has shorter macroconidia compared to C. pauciramosa, but based on additional DNA studies, this difference is now regarded as being due to intraspecific variations (Liu et al., 2020).

Calonectria mossambicensis
Cylindrocladium pauciramosum
Calonectria polizzii