Page Banner

United States Department of Agriculture

Agricultural Research Service

Pearl Millet Diseases: Fungal: Exserohilum

Pearl Millet Diseases
Fungal Diseases

Exserohilum Leaf Blight

Exserohilum rostratum (Drechs.) K.J. Leonard & E.G. Suggs

Symptoms: Foliar lesions (1-2 × 2-5 mm) are straw colored with brown margins. Lesions are often dark brown at first and then become light brown. Blighting often occurs on leaf tips and margins.

Pathogen and disease characteristics: Pigmented conidia are quite variable but approximately 200 × 8 µm, straight or slightly curved, and rostrate shaped. There are 6 to 16 septa. Terminal septa are particularly dark and thickened. A distinct hilum forms on the basal cell.

Host range: Pearl millet, maize, sorghum, Setaria italica (L.) Beauv., Eleusine coracana Garten.

Geographic distribution: India, United States.

Nomenclature discrepancies: Synonyms: Drechslera rostrata, Exserohilum rostrata (Drechs.) Shoem., Helminthosporium rostratum Drechs.

Seed transmission: Can be isolated from seed (table 4). Seedling infection from contaminated seed has not been demonstrated.

Primary citations: Young et al. 1947, Mohan et al. 1988.

previous page next page 

United States Department of Agriculture
Agricultural Research Service

The material on this page is in the public domain.

Original posting: June 5, 1999.

Last Modified: 2/6/2002
Footer Content Back to Top of Page