Absence of Ophiognomonia leptostyla from Australia

Publication Date

Tue, 24 May 2016, 00:16

Last Updated

May 24, 2016, 12:16 a.m.

Report Number

AUS-73/1

Country

Australia

Pest Id

Ophiognomonia leptostyla - (GNOMLE)

Report Status

Final

Hosts

English Walnut (Juglans regia)

Pest Status (old values from ISPM 8 -1998 )

• Absent: pest records invalid
• Absent: pest records unreliable

Pest Status (ISPM 8 - 2021)

• Absent: pest records invalid

Summary

There are no pest records for Ophiognomonia leptostyla from Queensland, the Northern Territory, Western Australia, New South Wales, the Australian Capital Territory and Tasmania. Ophiognomonia leptostyla is recorded in Australia from South Australia (Cook and Dubé, 1989) and Victoria (APPD, 2015).

The South Australian reference in Cook and Dubé (1989) cites the presence of Marssonina juglandis (synonym) on Jugulans regia (walnut) with no specimen record, no location or date of collection. There are no other records of Ophiognomonia leptostyla in South Australia. For this reason, this record is considered unreliable.

Victoria has a single specimen record for Ophiognomonia leptostyla collected in 1914 from Bacchus Marsh, Victoria (APPD, 2015). Plant pathologists from the Department of Primary Industries, Victoria have examined the specimen in 2000 and again in 2016, and determined that the morphology of the specimen did not match the taxonomic description of Ophignomonia leptostyla (as per Walker et al., 2012) and is suspected to be Diaporthe eres. There are no other records of Ophiognomonia leptostyla in Victoria. For this reason, the record was determined to be a misidentification and therefore invalid.

References Cook, R. P.; and Dubé, A. J. (1989) Host-pathogen index of plant diseases in South Australia. South Australian Department of Agriculture, 1-142 pp. [As Marssonina juglandis.]

APPD (2015) Occurrence record VPRI 632a. Victorian Plant Pathology Herbarium; on the Australian Plant Pest Database. Viewed 24 November 2015. [As Gnomonia leptostyla.]

Walker, D.M.; Castlebury, L.A.; Rossman, A.Y.; Mejía, L.C.; and White, J.F. (2012) Phylogeny and taxonomy of Ophiognomonia (Gnomoniaceae, Diaporthales), including twenty-five new species in this highly diverse genus. Fungal Diversity. November 2012. 57(1): 85-147.

Danger

Determination that the pest is not present.

Contact for info

Australian Chief Plant Protection Officer Australian Government Department of Agriculture GPO Box 858 Canberra ACT 2601 [email protected]

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