Curvularia Leaf Spot
Curvularia penniseti (Mitra) Boedijn
Symptoms: Small yellow-brown spots on leaves expand
to oblong lesions. Centers of lesions change to brown and margins
remain yellow. Lesions are more common on leaf margins.
Pathogen and disease characteristics: Conidia are 29-42
× 13-20 µm at broadest part, triseptate, clavate, and
almost always slightly curved at the third cell from the base,
which is larger than the others. Cell at each end are subhyaline
or pale, intermediate cells are brown, third cell from the base
is usually more pigmented and darker.
Host range: Oryza, Pennisetum, Sorghum,
Triticum. Isolated from Allium, Dolichos,
Geographic distribution: Australia, India, Indonesia,
Malawi, Nepal, Nigeria, Pakistan, continental United States, Hawaii
(C. lunata, Raabe et al. 1981),
Nomenclature discrepancies: Synonyms or similar pathogens:
Acrothecium penniseti Mitra
Other species of Curvularia can be isolated from pearl
Curvularia geniculata (Tracy & Earle) Boed.
Curvularia lunata (Wakker) Boed. [A toxin produced by
this pathogen is related to host and cultivar specificity (Gour et al. 1992).]
No information is available to indicate if symptoms caused
by other species of Curvularia differ from symptoms caused
by C. penniseti.
See table 3 for additional Curvularia
species pathogenic to Pennisetum.
Seed transmission: Curvularia species are frequently
isolated from seed.
Primary citations: Luttrell
1954, Sivanesan 1990a.
Department of Agriculture
The material on this page is in the public
Original posting: June 5, 1999.