Fitopatologia Brasileira (2005) 30, 72-74

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José R.N. Anjos, Maria J.A. Charchar, Sérgio S.N. Anjos and Rogério N. Teixeira (2005)
Phoma sp. (sect. Peyronellaea), como agente etiológico de mancha foliar de Paspalum atratum no Brasil
[Phoma sp. (sect. Peyronellaea), as causal agent of leaf spot on Paspalum atratum in Brazil]
Fitopatologia Brasileira 30 (1), 72-74
Abstract: The fungus Phoma sp. (sect. Peyronellaea) was consistently isolated from infected Paspalum atratum cv. Pojuca (Pojuca grass) plants with leaf spot symptoms in the Federal District, Brazil, in 2002. Conidia were hyaline, usually ellyptical, unicellular, gutullate, 2,50-5,25 x 10,25-17,25 µm. Pycnidia were mostly solitary, 100-310 µm diameter, globose, usually with a short neck. Multicellular chlamidospores often resembling conidia of Alternaria were present in the colonies. Pathogenicity tests under greenhouse conditions and subsequent reisolations of Phoma sp. from artificially inoculated Pojuca seedlings confirmed the hypothesis that this fungus was the causal agent of the disease. Symptoms of leaf spot appeared four to five days after inoculation in 100% of the inoculated Pojuca grass plants. All seven species of grasses evaluated were susceptible to this fungus. The occurrence of leaf spots of Pojuca grass caused by Phoma sp. is reported for the first time in Brazil.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
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Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

Pest and/or beneficial records:

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

Phoma (anamorphic genus) Paspalum (crop) Brazil (south)