Bipolaris sacchari

Bipolaris • Pleosporales • Dothideomycetes • Ascomycota • fungi • plant diseases • pests-diseases-weeds

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Bipolaris sacchari - A) leaf spots on Saccharum officinarum, B) conidiophore, C–F) conidia - scale bars: A = 500 μm, B = 10 μm, C–F = 5 μm (click on image to enlarge it)
Author(s): D.S. Manamgoda, A.Y. Rossman, L.A. Castlebury, P.W. Crous, H. Madrid, E. Chukeatirote and K.D. Hyde
Source: Studies in Mycology, 2014, 79, p. 264

Bipolaris sacchari (E.J. Butler) Shoemaker 1959

This fungus is widely distributed in tropical countries and causes the eyespot disease on sugarcane. It also infects maize and various grasses, including some weeds (see Bipolaris sacchari as weed pathogen). The eyespots are initially red and small. They then become elongated (5-10 mm) with a straw-colored centre and a red halo.

The conidia are typically 60-80 µm long, straight, brown to olivaceous and septate. They are often swollen at the base. Bipolaris stenospila which also infects sugarcane has larger conidia (typically 80-90 μm). See Manamgoda et al. (2014) for details.

Synonyms:
Helminthosporium sacchari