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Colletotrichum alienum B.S. Weir & P.R. Johnst. 2012

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Colletotrichum alienum B.S. Weir & P.R. Johnst., Studies in Mycology 73 139 (2012)
Colletotrichum alienum B.S. Weir & P.R. Johnst. 2012

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Exotic
Present
New Zealand
Political Region
Known from Australia and New Zealand, common on a wide range of introduced fruit crops

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B.S. Weir & P.R. Johnst.
B.S. Weir & P.R. Johnst.
2012
139
ICN
Colletotrichum alienum B.S. Weir & P.R. Johnst. 2012
species
Colletotrichum alienum

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Colletotrichum alienum B.S. Weir & P.R. Johnst. 2012

Other specimens examined: Australia, New South Wales, Murwillumbah, on Persea americana (DAR 37820 = IMI 313842 = ICMP 18691). New Zealand, Auckland, Oratia, Shaw Rd, on Malus domestica fruit rot, coll. P.R. Johnston C938.5, 14 Apr. 1988 (ICMP 18725); Bay of Plenty, Katikati, on Diospyros kaki ripe fruit rot, coll. M.A. Manning, Jun. 1989 (ICMP 17972); Bay of Plenty, Te Puke, on Persea americana ripe fruit rot, coll. W.F.T. Hartill, 2 Feb. 1988 (ICMP 18704); Bay of Plenty, Te Puna, on Persea americana ripe fruit rot, coll. W.F.T. Hartill, 25 Jan. 1988 (ICMP 18703); Bay of Plenty, on Persea americana ripe fruit rot, coll. W.F.T. Hartill, Feb. 1991 (ICMP 18621); Waikato, Hamilton, on Malus domestica fruit rot, coll. G.I. Robertson, May 1988 (ICMP 12068).
Colonies grown from single conidia on Difco PDA 85 mm diam after 10 d. Colonies often with distinct sectors; some with cottony, grey aerial mycelium with numerous dark-based acervuli and orange conidial ooze visible through the mycelium; others with dense, cottony to felted mycelium, fewer acervuli and these hidden by the dense mycelium. In reverse, irregular dark grey patches and sectors masking the pale orange coloured pigmentation. ICMP 18691 looks “stale” with slow growth, dense, pale aerial mycelium and sparse conidial production and no perithecia. Conidia (12.5–) 15.5–17.5(–22) × (3–)5–5.5(–6) μm (av. 16.5 × 5.0 μm, n = 70), cylindric with broadly rounded ends. Appressoria mostly simple, globose to short-cylindric, a few with broad, irregular lobes; ICMP 18691 has mostly lobed appressoria. Perithecia forming in most cultures after about 10 d, dark-walled, globose with short, narrow ostiolar neck. Ascospores (14.5–)17–19.5(–22) × 4–5(–6) μm (av. 18.1 × 4.6 μm, n = 55), cylindric, curved, tapering slightly to each end.
Geographic distribution and host range: Known only from Australia and New Zealand, common on a wide range of introduced fruit crops.
Genetic identification: ITS sequences do not separate C. alienum from some C. siamense isolates. These taxa are best distinguished using CAL or GS. Notes: Common on commercial fruit crops, this fungus was referred to as C. gloeosporioides Group A by Johnston & Jones (1997) and Johnston et al. (2005).
Holotype: New Zealand, Auckland, Kumeu research orchard, Malus domestica fruit rot, coll. P.R. Johnston C824, 14 Aug. 1987, PDD 101996; ex-type culture ICMP 12071.

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Colletotrichum alienum B.S. Weir & P.R. Johnst. 2012
Colletotrichum alienum B. Weir & P.R. Johnst. 2012
Colletotrichum alienum B.S. Weir & P.R. Johnst. 2012
Colletotrichum alienum B. Weir & P.R. Johnst.
Colletotrichum alienum B.S. Weir & P.R. Johnst. 2012

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Colletotrichum alienum B.S. Weir & P.R. Johnst. 2012
[Not available]
Colletotrichum alienum B.S. Weir & P.R. Johnst. 2012
Australia
Colletotrichum alienum B.S. Weir & P.R. Johnst. 2012
New Zealand
Auckland
Colletotrichum alienum B.S. Weir & P.R. Johnst. 2012
New Zealand
Bay of Plenty
Colletotrichum alienum B.S. Weir & P.R. Johnst. 2012
New Zealand
New Zealand
Colletotrichum alienum B.S. Weir & P.R. Johnst. 2012
New Zealand
Northland
Colletotrichum alienum B.S. Weir & P.R. Johnst. 2012
New Zealand
Waikato

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typification
Holotype: PDD 101996; ex-holotype culture ICMP 12071

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f7cd112a-ee31-4252-a941-8abe0a5985d9
scientific name
Names_Fungi
21 October 2011
31 December 2021
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