Descriptions and Lists from
the VIDE Database
Data collated by R.G. Milne, 1984.
ICTV decimal code
Host range and symptoms First reported
in Digitaria decumbens; from Surinam; by Dirven and van Hoof (1960).
Natural host range and symptoms
- Digitaria decumbens - chlorosis and reddening, leaves and
flower heads malformed, curled and stunted, small veins swollen.
Transmitted by a vector; an insect;
Sogatella furcifera; Delphacidae. Transmitted in a persistent manner.
Virus retained when the vector moults; multiplies in the vector; not transmitted
congenitally to the progeny of the vector; not transmitted by mechanical
inoculation; not transmitted by grafting; not transmitted by contact between
plants; not transmitted by seed; not transmitted by pollen.
Spreads in Australia, Brazil, Fiji,
Guyana, Peru, and Taiwan.
Experimental host range
Few (<3) families susceptible.
Diagnostically susceptible host species and symptoms
- Almost all Digitaria spp. are susceptible. D.
decumbens PI 111110, D. longiflora PI 299642, D. pentzii PI
299769, D. setivalvola PI 299795, D. valida PI 299875 -
stunting, yellowing and twisting of leaves and inflorescences, small veins
swollen, excessive tillering.
Maintenance and propagation hosts
Digitaria decumbens and other Digitaria spp.
Assay hosts (Local lesions or Whole plants)
Susceptible host species
Families containing susceptible hosts
Sources of host-range data
et al. (1974); Milne and Lovisolo (1977).
Properties of particles in sap
contains few virions (when prepared from whole leaves), or contains many virions
(when prepared only from enations). Electron microscopy: to obtain complete or
subvirions with intact spikes, use 2% aqueous UA not neutral PTA.
Virions isometric; not enveloped;
complete virions including spikes 70 nm in diameter (when negative stained and
in thin section); rounded in profile, or angular in profile; with a conspicuous
Two sedimenting components in
purified preparations (virions and spiked subvirions).
Genome consists of RNA;
double-stranded; linear. Total genome size 25.188 kb. Genome of 10 parts
(called S1-10); largest (or only) genome part the largest 3.405 kb; the 2nd
largest 3.385 kb; the 3rd largest 3.385 kb; the 4th largest 2.6 kb; the 5th
largest 2.55 kb; the 6th largest and other parts 2.49 kb (pairs; also 2.190,
1.735, 1.728 and 1.720 kb pairs). Genomic nucleic acid isolated by Boccardo
et al. (1979). Additional factor required for infectivity (only complete
virions are infective).
Features of the genome
Non-genomic nucleic acid
not found in the virions.
Features of proteins
Virion protein(s) virion
proteins probably similar in size to those of maize rough dwarf virus.
Genome replicates in cytoplasmic viroplasms.
Coat protein mRNA translated in the cytoplasm. Replication does not
depend on a helper virus.
Virions found in phloem and phloem derived
enations; in cytoplasm. Inclusions present in infected cells; are crystals in
the cytoplasm, viroplasms, and unusual in shape; tubular structures 100 nm in
diameter; they contain virions. Other cellular changes: thickening of cell walls
and cell enlargement.
Virus(es) with serologically related virions
Maize rough dwarf and rice black streaked dwarf viruses and are
Virus(es) with serologically unrelated
Oat sterile dwarf, sugarcane Fiji
disease, rice dwarf, rice gall dwarf, rice ragged stunt and clover wound tumor
- Boccardo, G. and Milne,
R.G. (1981). J. virol. Meth. 3: 109.
- Boccardo, G. and Milne,
R.G. (1984). CMI/AAB Descr. Pl. Viruses No. 294, 7 pp.
- Boccardo, G.,
Milne, R.G. and Luisoni, E. (1979). J. gen. Virol. 45: 659.
- Conti, M. (1984). Current Topics in Vector Research; ed. K.F. Harris.
Praeger Scientific, New York.
- Dirven, J.G.P. and van Hoof, E.M. (1960).
Tijdsch. PlZiekt. 66: 344.
- Giannotti, J. and Milne, R.G.
(1977). Virology 80: 347.
- Hunkar, A.E.S., Hung, A.T.A.,
Dulder, I.G., Schank, S.C., Holder, N. and Edwards, C. (1974). Trop.
Agric. 52: 75.
- Milne, R.G. (1977). CMI/AAB Descr. Pl.
Viruses No. 175, 4 pp.
- Milne, R.G. and Lovisolo, O. (1977). Adv.
Virus Res. 21: 267.
- Milne, R.G. and Luisoni, E. (1977).
Virology 80: 12.
Cite this publication as:
Brunt, A.A., Crabtree, K., Dallwitz, M.J., Gibbs, A.J., Watson, L. and Zurcher, E.J. (eds.)
`Plant Viruses Online: Descriptions and Lists from the VIDE Database.
Version: 20th August 1996.' URL
Dallwitz, Paine and Zurcher (1993)
should also be cited.
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