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Talinum patens (Jacq.) Willd (local names: “lingua de vaca”, “bencao-de-deus” and “maria-gomes”) is a herbaceous plant, native to the Americas, belonging to the Portulacaceae family. It is popularly used as a vegetable in north and northeastearn Brazil and is known to have some medicinal properties (Daniel et al., Plantas Medicinais, Editora UFV, 2000). It is also regarded as an invasive weed in some situations (Kissmann & Groth, Plantas Infestantes e Nocivas, 1 ed.,BASF S.A., 1995). Leaf spots were observed on T. patens growing close to a cocoa (Theobroma cacao L.) nursery in Itabuna, Bahia, in March 2002. Lesions on living leaves were circular, 1-5 mm in diameter, reddish brown with a dark olivaceous border (Figure 1A). Cercospora talini Syd. & P. Syd. (Figure 1B and C) was regularly associated with such lesions. The only record of this fungus is from Argentina and Venezuela (Chupp, A monograph of the fungal genus Cercospora, 1954). Morphological features for this fungus were: internal mycelium inconspicuous, external mycelium absent; stomata poorly developed, dark brown, minute; conidiophores pale brown, unbranched, cylindrical, two-ten per fascicle, one-five transverse septate, 40.0-80.0 x 4.0-5.0 μm, arising from stomatal openings. Conidiogenous cells terminal or intercalary, integrated, proliferating sympodially; conidiogenous loci thickened and darkened, one-two per cell, holoblastic; conidia filiform to obclavate, dry, solitary, straight to slightly curved, 50.0-120 x 2.0-3.5 μm, hyaline, seven-ten septate, base truncate with a thick and darkened scar (VIC 22220). This is the first record of C. talini in Brazil. Acknowledgments. We wish to thank Mr. Jose Lima da Paixao, CEPLAC Herbarium, for the plant identification. FIG. 1 Cercospora talini on Talinum patens: (A) symptoms on leaves, (B) conidiophores and (C) conidia. Scale bars (B;C): 25 μm.

Cercospora talini em Talinum patens no Brasil