Studies in Mycology (2006) 55, 189-197

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Pedro W. Crous, Johannes Z. Groenewald, Marizeth Groenewald, Pat Caldwell, Uwe Braun and Thomas C. Harrington (2006)
Species of Cercospora associated with grey leaf spot of maize
Studies in Mycology 55, 189-197
Abstract: Grey leaf spot is a serious yield-reducing disease of maize (Zea mays) in many parts of the world where this crop is cultivated. The causal organism associated with the disease is Cercospora zeae-maydis. Two potential sibling species have been recognized as Groups I and II. The DNA sequences for the internal transcribed spacers (ITS1 and ITS2), the 5.8S rRNA gene, elongation factor 1-α, histone H3, actin and calmodulin gene regions suggest that Groups I and II are two distinct species. Furthermore, Cercospora zeae-maydis (Group I) can be distinguished from C. zeina sp. nov. (Group II) by its faster growth rate on artificial media, the ability to produce cercosporin, longer conidiophores, and broadly fusiform conidia. A PCR-based test that distinguishes the two species was developed using species-specific primers designed from the histone H3 gene.
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Database assignments for author(s): Pedro W. Crous, Johannes Z. Groenewald, Marizeth Groenewald, Uwe Braun, Thomas C. Harrington

Research topic(s) for pests/diseases/weeds:
identification/taxonomy


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Cercospora beticola Beet/sugarbeet (Beta vulgaris) Germany
Cercospora beticola Beet/sugarbeet (Beta vulgaris) Italy
Cercospora beticola Beet/sugarbeet (Beta vulgaris) Netherlands
Cercospora beticola Beet/sugarbeet (Beta vulgaris) Romania
Cercospora beticola Beet/sugarbeet (Beta vulgaris) Iran
Cercospora beticola Beet/sugarbeet (Beta vulgaris) New Zealand
Cercospora zeae-maydis Maize/corn (Zea mays) Georgia
Cercospora zeae-maydis Maize/corn (Zea mays) U.S.A. (SW)
Cercospora zeae-maydis Maize/corn (Zea mays) Azerbaijan
Cercospora zeae-maydis Maize/corn (Zea mays) Cameroon
Cercospora zeae-maydis Maize/corn (Zea mays) Ethiopia
Cercospora zeae-maydis Maize/corn (Zea mays) Kenya
Cercospora zeae-maydis Maize/corn (Zea mays) Nigeria
Cercospora zeae-maydis Maize/corn (Zea mays) Tanzania
Cercospora zeae-maydis Maize/corn (Zea mays) Uganda
Cercospora zeae-maydis Maize/corn (Zea mays) Malawi
Cercospora zeae-maydis Maize/corn (Zea mays) Mozambique
Cercospora zeae-maydis Maize/corn (Zea mays) South Africa
Cercospora zeae-maydis Maize/corn (Zea mays) Eswatini
Cercospora zeae-maydis Maize/corn (Zea mays) Costa Rica
Cercospora zeae-maydis Maize/corn (Zea mays) Guatemala
Cercospora zeae-maydis Maize/corn (Zea mays) Mexico
Cercospora zeae-maydis Maize/corn (Zea mays) Panama
Cercospora zeae-maydis Maize/corn (Zea mays) Colombia
Cercospora zeae-maydis Maize/corn (Zea mays) Ecuador (continental)
Cercospora zeae-maydis Maize/corn (Zea mays) Peru
Cercospora zeae-maydis Maize/corn (Zea mays) Trinidad and Tobago
Cercospora zeae-maydis Maize/corn (Zea mays) U.S.A. (mid N)
Cercospora zeae-maydis Maize/corn (Zea mays) U.S.A. (NE)
Cercospora zeae-maydis Maize/corn (Zea mays) U.S.A. (SE)
Cercospora sorghi Sorghum (crop) U.S.A. (mid S)
Cercospora canescens Cowpea and relatives (Vigna) Taiwan
Cercospora apii Onion/garlic/leek (Allium) Germany
Cercospora apii Onion/garlic/leek (Allium) Italy
Cercospora zeina Maize/corn (Zea mays) Uganda
Cercospora zeina Maize/corn (Zea mays) South Africa
Cercospora zeina Maize/corn (Zea mays) Zambia
Cercospora zeina Maize/corn (Zea mays) Zimbabwe
Cercospora zeina Maize/corn (Zea mays) U.S.A. (NE)