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.
|previous page||next page|
The material on this page is in the public domain.
Original posting: June 5, 1999.