A Pyrenophora teleomorph was recently found on barley stubble in South
Africa. Single-ascospore isolates, mated on water agar containing ste
rile pieces of barley stubble, produced the teleomorph within 12 month
s of incubation at 15 degrees C in the dark. Based on morphological ch
aracteristics and symptom expression on barley plants, the teleomorph
is ascribed to P. japonica (anamorph Drechslera tuberosa). This is the
first report describing the occurrence of the teleomorph of D. tubero
sae in South Africa.