Biology Reference
In-Depth Information
Transmission is through seed of petunia (but
not of tobacco), by nematodes and in some crops
by grasshoppers.
Tomato Big Bud
Leaves curl and hang down; stems are shortened
and calyxes greatly enlarged.
Tobacco Streak Ilarvirus
Tomato Black Ring Nepovirus
On tobacco, soybean, sweet clover, tomato, com-
mon yellow mustard, wild radish, milk thistle,
and experimentally a wide range of hosts. Irreg-
ular spots, lines, and rings. Distributed world-
wide. Virus is known as Asparagus Stunt Virus,
Datura Quercina Virus and Strawberry Necrotic
Shock Virus. It is transmitted by thrips, by sap
and by seeds. Virus is also transmitted by pollen
to the pollinated plants.
Transmitted by nematodes, seeds and pollen.
Virus caused necrotic ringspots, systemic chlo-
rotic ringspots, mottling, stunting and leaf mal-
formation of the following plant genera:
Allium,
Apium, Beta, Fraxinus, Lactuca, Lycopersicon,
Narcissus, Phaseolus, Robinia, Rubus, Solanum,
Tulipa
and
Vitis
.
Tobacco Vein Mottling Potyvirus
Tomato Bushy Stunt Tombusvirus
Transmitted by aphids in non-persistent manner.
Its natural host plants are Rumex sp.,
Nicotiana
tabacum
and
Solanum carolinense
. Virus caused
chlorotic vein banding symptoms on infected
plants.
Strains of this virus are known as Carnation
Italian Ringspot Tombusvirus, Pelargonium
Leaf Curl Tombusvirus and Petunia Asteroid
Mosaic Tombusvirus. Virus transmitted by
means not involving vectors. Virions were
found in all parts of the host plant: in cytoplasm,
in nuclei,
in nucleoli,
in mitochondria and
Tobacco Yellow Net Luteovirus
in cell vacuoles.
It
forms crystals in the
cytoplasm.
Spreads by aphids -
Myzus persicae
in California.
Virus differs in host range from Beet Yellow Net
Luteovirus.
Tomato Chino La Paz Begomovirus
Found on tomato in Baja California, Mexico.
Tomato Aspermy Cucumovirus
Tomato Enation Mosaic
Chrysanthemum Aspermy. On tomato the grow-
ing point of the main stem is inhibited, axillary
shoots giving the plants a bushy appearance; fruit
production is curtailed; there may be failure to set
seed. The disease was introduced into North
America on European and Asiatic varieties of
chrysanthemums, which have mottled leaves.
Transmission is by foxglove, green peach, and
green and black chrysanthemum aphids. Peren-
nial chrysanthemums near
Caused
by a
strain of Tobacco Mosaic
Tobamovirus.
Tomato Fernleaf
Shoestring. Caused by Cucumber Mosaic
Cucumovirus sometimes with Tobacco Mosaic
tobamovirus.
tomato fields are
a source of infection.
