Neofusicoccum parvum
Neofusicoccum parvum (Pennycook & Samuels) Crous, Slippers & A.J.L. Phillips, in Crous, Slippers, Wingfield, Rheeder, Marasas, Phillips, Alves, Burgess, Barber & Groenewald, Stud. Mycol. 55: 248 (2006)
Index Fungorum number: IF 500879; Facesofungi number: FoF 02411
Saprotrophic on dead and aerial branches of Vitis vinifera. Sexual morph: Not observed (see Philips et al. 2013 for a description). Asexual morph: Conidiomata 210–290 μm diam., globose and apapillate to pyriform with a short, acute papilla, entire locule lined with conidiogenous cells. Conidiogenous cells 7–25 × 2–4 μm (x̄ =15 × 3 μm, n = 20), holoblastic, hyaline, subcylindrical, proliferating percurrently to form 1–2 annellations, or proliferating at the same level to form periclinal thickenings. Conidia 12–23 × 4–6 μm (x̄ = 15 × 3 μm, n = 30), ellipsoidal with apex round and base flat, unicellular, hyaline, old conidia becoming 1–2-septate, hyaline, or light brown with the middle cell darker than the end cells.
Cultural characteristics: Colonies on PDA reaching 80 mm diam. in 5 days at 25° C. Mycelium white, flat and dense, becoming light iron-grey after 14 days, with entire margin with slightly undulate edge
Material examined: ITALY, Province of Forlì-Cesena, Trivella di Predappio, on dead and aerial branch of Vitis vinifera (Vitaceae), 9 December 2015, Erio Camporesi IT 2726 (MFLU 16-0648); culture, MFLUCC 17-1254.
Notes: Neofusicoccum parvum has a wide host range and a wide distribution. This species is an important pathogen of grapevine causing Botryosphaeria die back in many grape growing regions in the world (Philips et al. 2013).
Figure x. Neofusicoccum parvum. a. Conidiomata on host. b. Conidiogenous cells. c-d. Conidia. e. Surface view of the colony. f. Reverse view of the colony. Scale bars: b–d=10 mm.
References:
Jayawardena RS, Hyde KD, Chethana KW, Daranagama DA et al. 2018 – Saprotrophic fungi on Vitis in China, Italy, Russia and Thailand. Mycosphere notes 9, 1–114.
Phillips AJL, Alves A, Abdollahzadeh J, Slippers B et al. 2013 – The Botrysphaeriaceae: genera and species known from culture. Studies in Mycology 76, 51–167.
Last Update: 14 September 2021