1. Padil Species Factsheet Scientific Name: Common Name Image Library Partners for New Zealand Biosecurity Image Library

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1. Padil Species Factsheet Scientific Name: Common Name Image Library Partners for New Zealand Biosecurity Image Library

1. PaDIL Species Factsheet Scientific Name: Cercospora lactucae-sativae Sawada (Ascomycota: Dothideomycetes: Capnodiales: Mycosphaerellaceae) Common Name Cercospora lactucae-sativae Live link: http://www.padil.gov.au/maf-border/Pest/Main/143004 Image Library New Zealand Biosecurity Live link: http://www.padil.gov.au/maf-border/ Partners for New Zealand Biosecurity image library Landcare Research — Manaaki Whenua http://www.landcareresearch.co.nz/ MPI (Ministry for Primary Industries) http://www.biosecurity.govt.nz/ 2. Species Information 2.1. Details Specimen Contact: Eric McKenzie - [email protected] Author: McKenzie, E. Citation: McKenzie, E. (2013) Cercospora lactucae-sativae(Cercospora lactucae-sativae)Updated on 3/20/2014 Available online: PaDIL - http://www.padil.gov.au Image Use: Free for use under the Creative Commons Attribution-NonCommercial 4.0 International (CC BY- NC 4.0) 2.2. URL Live link: http://www.padil.gov.au/maf-border/Pest/Main/143004 2.3. Facets Commodity Overview: Field Crops and Pastures Commodity Type: Lettuce Distribution: Oceania, Afrotropic, Antarctic, Australasia, Indo-Malaya, Nearctic, Neotropic, Palearctic Groups: Fungi & Mushrooms Host Family: Asteraceae Pest Status: 2 NZ - Regulated pest Status: 0 NZ - Unknown 2.4. Other Names Cercospora apii sensu lato Cercospora lactucae J.A. Stev. Cercospora lactucae Welles Cercospora longispora Cugini ex Trav. Cercospora longissima Trav. Cercospora longissima Cugini ex Sacc. 2.5. Diagnostic Notes **Disease** Leaf spots circular or oval, up to 1 cm diam, sometimes coalescing to cover large areas of the leaf, grey or light brown with a small (0.5–1 mm) whitish centre. **Morphology** _Conidiophores_ single or in fascicles of 2–10, pale olivaceous brown, 25–90 × 4–6 µm, on both leaf surfaces. Conidiophores usually continue to elongate, producing successive conidia, and hence 2 or more scars. _Conidia_ 20–220 × 3.5–5 µm, hyaline, 10–20-septate, smooth, obclavate, straight or slightly curved, tip rounded, basal cell truncate with distinct scar. **Note** This fungus is considered by Crous & Braun (2003) to be close to _Cercospora apii_ sensu lato. 2.6. References - Crous, P.W. & Braun, U. (2003). _Mycosphaerella and its anamorphs: 1. Names published in Cercospora and Passalora_. CBS Biodiversity Series 1. 571 pp. - Ellis, M.B. (1976). _More Dematiaceous Hyphomycetes_. Commonwealth Mycological Institute, Kew, Surrey, England, pp. 251–252. - Hsieh, W.-H. & Goh, T.-K. (1990). _Cercospora and Similar Fungi from Taiwan_. Maw Chang Book Company, Taipei, pp. 69–70. 3. Diagnostic Images Cercospora longissima conidiophores and Cercospora longissima conidiophores and conidia conidia Conidiophores & Conidia: E. McKenzie Conidiophores & Conidia: E. McKenzie Landcare Research Landcare Research Cercospora longissima conidiophores and Cercospora longissima leaf spot on lettuce conidia In Life: E. McKenzie Landcare Research Conidiophores & Conidia: E. McKenzie Landcare Research Results Generated: Sunday, September 26, 2021 .

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Species Concepts in Cercospora: Spotting the Weeds Among the Roses
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