Septoria Tritici Blotch in Chilean Wild Oat. Ricardo Madariaga B., Former Graduate Student, Department of Plant Pathology, Montana State University, Bozeman 59717. A. L. Scharen, USDA, ARS, Department of Plant Pathology, Montana State University, Bozeman 59717. Plant Dis. 69:126-127. Accepted for publication 11 July 1984. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1985. DOI: 10.1094/PD-69-126.

Septoria tritici blotch is one of the most economically important diseases of Chilean wheat. Abundant pycnidia of a Septoria sp. in wild oat plants within wheat crops make this Septoria sp. suspect of being involved in the epidemiology of the blotch disease in wheat. Cross-inoculation studies, morphology of conidia, and growth habit in artificial media indicated that the Septoria sp. in wild oats differs from S. tritici that damages wheat and is most likely S. tritici f. avenae.