Maize Streak Virus (MSV)
Symptoms: Chlorotic streaks on foliage are generally
not severe. On inoculated seedlings, light-colored circular spots
develop, usually on one side of the leaf and parallel to the midrib.
Spots coalesce to form nearly uninterrupted chlorotic bands running
the length of the leaf. New emerging leaves show well-developed
chlorotic stripes along the length of the leaf (Seth
et al. 1972a).
Pathogen and disease characteristics: This geminivirus
is transmitted by at least eight leafhopper species.
Host range: Pearl millet, maize, sugarcane, wheat, barley,
oat, finger millet (Eleusine coracana), African rice (Oryza
glaberrima Steudel), Axonopus compressus, Brachiaria
lata, B. deflexa, B. distichophylla, Coix
lacryma-jobi, Dactyloctenium aegyptium, Digitaria horizontalis,
Eleusine indica, Echinochloa colonum, E. stagnina, Oryza sativa,
Paspalum conjugatum, P. notatum, P. scrobiculatum, Panicum maximum,
Pennisetum polystachion, Rhynchelytrum repens, Rottboellia cochinchinensis,
Setaria barbata, and many other hosts within the Gramineae.
Geographic distribution: Egypt, India, Madagascar, Malawi,
Mauritius, Nigeria, Réunion, South Africa, Uganda.
Nomenclature discrepancies: Alternative disease names:
Pennisetum strain of maize streak virus, bajra streak, sugarcane
streak virus, panicum streak virus.
Numerous strains exist. Isolates from pearl millet cross-react
with antisera from maize, panicum, and sugarcane isolates. Isolates
from pearl millet probably belong to the Panicum strain
and appear to be too distantly related to MSV from maize to be
important in relation to MSV in the field. Pearl millet is susceptible
to the "Eleusine strain," according to Nagaraju
and Viswanath (1983). Later work (Briddon et al. 1996) indicates that isolates
from pearl millet are most closely related to sugarcane streak
Seed transmission: Not known to be transmitted by seed.
Primary citations: Shurtleff
1980, Nagaraju and Viswanath 1983,
Mesfin et al. 1992.
Department of Agriculture
The material on this page is in the public
Original posting: June 5, 1999.