Graminicolous species of Bipolaris, Drechslera and Curvularia in the V region (Chile): morphologic and biogeographic aspects.
By culture in a moist chamber with water agar, the presence and biogeographic distribution of the Curvularia and Helminthosporium "complex" was studied in 19 wild Gramineae [Poaceae] species collected in 20 localities of the V region, Chile. In the 88 fungal isolations, the genera Bipolaris (77.2%), Curvularia (12.5%) and Drechslera (10.2%) were detected. B. cynodontis [Cochliobolus cynodontis] (45.5%) and B. australiensis [Cochliobolus australiensis] (27.3%) were predominant, Curvularia (C. lunata [Cochliobolus lunatus] (1.1%) and C. affinis (1.1%)) were sporadic. The species and localities with a higher diversity of species were Sorghum (5) and Zea (3), Curacavi (6 taxa) and Quillota (3 taxa), respectively. Dichotomic keys are provided. Some morphophysiological characteristics of the dominant species are compared and certain human pathologies caused by these fungi reviewed.