Southern Blight
Sclerotium rolfsii Sacc.
Symptoms: Disease is expressed as seed decay, pre-emergence
and postemergence damping off, stem lesions on seedlings, or stem
cankers on more mature plants. Infection and rot are restricted
to lower stem. Mature plants have considerable accumulation of
dead brown leaves around the base. Root system is much reduced,
with extensive killing and discoloration.
Pathogen and disease characteristics: White mycelium
and brown sclerotia often visible at the base of the plant.
Host range: Very wide. Nearly all are annuals.
Geographic distribution: United States (for pearl millet).
Nomenclature discrepancies: Synonym: Pellicularia
rolfsii (Sacc.) West.
Alternative disease name: White mold.
Seed transmission: Not known to be transmitted by seed.
Primary citation: Weber 1963.
United States
Department of Agriculture
Agricultural
Research Service
The material on this page is in the public
domain.
Original posting: June 5, 1999.
|
