Tropical Plant Pathology (2015) 40, 368-374

Danilo L. Neves, Cleiltan N. Silva, Carolina B. Pereira, Hercules D. Campos and Dauri J. Tessmann (2015)
Cercospora zeina is the main species causing gray leaf spot in southern and central Brazilian maize regions
Tropical Plant Pathology 40 (6), 368-374
Abstract: Maize (Zea mays) fields from a tropical central (Goiás state) and a subtropical south region (Paraná state) of Brazil were surveyed for Cercospora species causing gray leaf spot (GLS), a foliar fungal disease of increasing concern to growers of the country. Single spore isolates were obtained from maize leaves showing GLS symptoms and species-specific primers were used for species identification. In addition, a phylogeny of isolates representative of each species was conducted based on partial DNA sequencing of the EF1-alpha, CAL, and HIS genes, and ITS-5.8S rDNA region. In the regional collections, Cercospora zeina was the dominant species in Goiás (68/75 isolates) and Paraná (73/75 isolates), followed by C. zeae-maydis and C. sorghi var. maydis, respectively. In three field collections of both states, C. zeina was the sole species found. The phylogenetic characterization of isolates representing C. zeina (n = 18), C. zeae-maydis (n = 6), and C. sorghi var. maydis (n = 2) confirmed the identity of the species and grouped them in well-supported clades.
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Database assignments for author(s): Dauri J. Tessmann

Research topic(s) for pests/diseases/weeds:
surveys/sampling/distribution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Cercospora zeae-maydis	Maize/corn (Zea mays)	Brazil (south)
	Cercospora sorghi	Maize/corn (Zea mays)	Brazil (south)
	Cercospora zeina	Maize/corn (Zea mays)	Brazil (south)