Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Freesia leaf necrosis varicosavirus

Index

• Nomenclature
• Host range, transmission and symptoms
• Physical and biochemical properties
• Taxonomy and relationships
• Comments and References

Data collated by D. Peters, 1991; I. Bouwen, 1994; A.A. Brunt, 1995.

Nomenclature

ICTV decimal code

79.0.P.3.DE.2

Host range and symptoms

Natural host range and symptoms

Symptoms persist. Symptoms Chlorotic flecks, spots and necrosis. More severe when plants are stressed by bright light or waterlogging.
• Freesia spp. - chlorotic flecks and spots in leaves, which become necrotic. Flowers and corms unaffected.

Transmission

Transmitted by a vector; a fungus; Olpidium brassicae; Chytridiales. Virus transmitted by mechanical inoculation (with difficulty); not transmitted by seed.

Ecology and control

Studies reported by The virus occurs in soil and is spread by infected corms, hence it is controlled by soil treatment and corm choice (Hakkaart, 1971, 1975; Van Dorst, 1973, 1975, 1988).

Geographical distribution

Spreads in the Eurasian region; Germany, Ireland, Italy, the Netherlands, and the UK.

Experimental host range

Few (<3) families susceptible.

Diagnostically susceptible host species and symptoms

• Chenopodium quinoa, C. amaranticolor - pinpoint necrotic local lesions with chlorotic halo. Not systemic.
• Nicotiana hesperis (Accession 67A) - chlorotic local, and sometimes systemic, spots, centres becoming necrotic and white.
• Nicotiana occidentalis (Accession P1) - chlorotic spots and rings, sometimes systemic vein chlorosis.

Diagnostically insusceptible host species

Echinops exaltatus, Nicotiana glutinosa, N. tabacum cv. White Burley, Phaseolus vulgaris cv. Bataaf, Vicia faba cv. Compacta.

Maintenance and propagation hosts

Freesia refracta.

Assay hosts (Local lesions or Whole plants)

Freesia refracta (W), Chenopodium quinoa (L), Nicotiana hesperis (L), N. occidentalis (L).

Susceptible host species

• Chenopodium amaranticolor
• Chenopodium quinoa
• Freesia refracta
• Nicotiana hesperis
• Nicotiana occidentalis

Insusceptible host species

• Ageratum conyzoides
• Amaranthus caudatus
• Antirrhinum majus
• Atriplex hortensis
• Bellis perennis
• Beta vulgaris
• Capsicum annuum
• Catharanthus roseus
• Chenopodium murale
• Cucumis sativus
• Datura stramonium
• Echinops exaltatus
• Gomphrena globosa
• Lactuca sativa
• Lathyrus odoratus
• Lycopersicon esculentum
• Nicotiana clevelandii
• Nicotiana debneyi
• Nicotiana glutinosa
• Nicotiana rustica
• Nicotiana tabacum
• Papaver nudicaule
• Petunia × hybrida
• Phaseolus vulgaris (cv. Bataaf)
• Physalis floridana
• Pisum sativum
• Raphanus sativus
• Salvia splendens
• Sonchus oleraceus
• Spinacia oleracea
• Torenia fournieri
• Verbesina encelioides
• Vicia faba

Families containing susceptible hosts

• Chenopodiaceae (2/6)
• Iridaceae (1/1)
• Solanaceae (2/12)

Families containing insusceptible hosts

• Amaranthaceae (2/2)
• Apocynaceae (1/1)
• Chenopodiaceae (4/6)
• Compositae (6/6)
• Cruciferae (1/1)
• Cucurbitaceae (1/1)
• Labiatae (1/1)
• Leguminosae-Papilionoideae (4/4)
• Papaveraceae (1/1)
• Scrophulariaceae (2 /2)
• Solanaceae (10/12)

Physical and biochemical properties

No data available.

Taxonomy and relationships

Possible varicosavirus

Comments and References

General comments

This virus, together with freesia mosaic potyvirus, causes freesia streak disease (Brunt, 1974; Van Dorst, 1973).

References

• Bellardi, M.G. and Bertaccini, A. (1989). Adv. Hort. Sci. 3: 29.
• Bouwen, I. (1994). Acta. Hort. in press.
• Brunt, A.A. (1970). Rep. Glasshouse Crops Res. Inst. 1969, p. 131.
• Brunt, A.A. (1974). Rep. Glasshouse Crops Res. Inst. 1973, p. 117.
• Caspar, R. and Brunt, A.A. (1971). Nachbl. PflSchutz., Braunschweig 23: 89.
• Foxe, M.J. and Wilson, U.E. (1985). Acta Hort. 164: 291.
• Hakkaart, F.A. (1971). Proc. 7th Conf. Czech. Pl. Virol. 1971: 231.
• Hakkaart, F.A. (1975). Jaarvers. Inst. Pl. Onderz. 1974, p. 70.
• Van Dorst, H.J.M. (1973). Neth. J. Pl. Path. :79 130.
• Van Dorst, H.J.M. (1975). Neth. J. Pl. Path. 81 45.
• Van Dorst, H.J.M. (1988). In: Viruses with Fungal Vectors, p. 315 (eds J.I. Cooper and M.J.C. Asher). Association of Applied Biologists, Wellesbourne, U.K.

Cite this publication as: Brunt, A.A., Crabtree, K., Dallwitz, M.J., Gibbs, A.J., Watson, L. and Zurcher, E.J. (eds.) (1996 onwards). `Plant Viruses Online: Descriptions and Lists from the VIDE Database. Version: 20^th August 1996.' URL http://biology.anu.edu.au/Groups/MES/vide/

Dallwitz (1980) and Dallwitz, Paine and Zurcher (1993) should also be cited.