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Maize
Rough
Dwarf
Virus
(MRDV) - MRDV causes severe disease in maize. Galls develop on the undersurface of leaves, along the veins.
There is also dwarfing and restriction of root development. MR DV multiplies in some 16 species of Graminae, and also in several species of plant hoppers, which act as vectors.
MRDV
is
a
large
spherical
virus
66
nm
in
diameter.
It
has
a
double
capsid
shell.
The
outer
shell
is
probably
made
up
of
92
morphological
units,
with
12
projections
or
spikes
(A-spikes)
about
II
Dm
in
length.
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