Biology Reference
In-Depth Information
Arabis Mosaic Nepovirus
Aster Chlorotic Stunt Carlavirus
It is one of the viruses that causes lilac yellow
ring symptoms. Occurred on many genera of
ornamental, vegetable and orchard plants. Trans-
mitted by nematodes. This virus causes foliar
blanching on hosta.
Reported in Aster novae-angliae in Ontario,
Canada.
Aster Ring Spot
In Florida on China aster, pepper, pansy,
and other plants. Yellow ring, line, and
oakleaf patterns. A strain of Tobacco Rattle
Tobravirus.
Artichoke (Globe) Curly Dwarf
Potexvirus
In California on artichoke, cardoon, and zinnia,
milk thistle. Leaves curled, plants dwarfed, killed.
Avocado Sun Blotch Viroid
Artichoke Latent Potyvirus
There are long, narrow, shallow, longitudinal
grooves, buff-colored on stems, whitish on
green fruit, reddish purple on purple fruit.
Shoots may be twisted and abnormal. Transmit-
ted through seeds.
Symptoms on
Cynara
spp. are none or stunting
and yellow flecking of plants.
Ash Ring Spot ¼ Arabis Mosaic
Nepovirus
Avocado 3 Alphacryptovirus
On white ash, New York. Chlorotic green and
reddish spots, rings, line patterns; stunting; dieback.
Transmitted only by seeds.
Barley Yellow Dwarf Luteovirus
Ash Witches' Broom
Occurs on tall fescue, and various
Poa
and
Festuca
spp. Occurs on cereal crops in Alaska.
Reported from Louisiana on Arizona ash.
Yellowish leaves, a fourth to a third normal
size; multiple, spindly shoots.
Barley Yellow Streak Mosaic
Asparagus 1 Potyvirus
Occurs on barley in Alaska.
Symptomless on
Asparagus officinalis
.
Bayberry Yellows
Asparagus 2 Ilarvirus
Wavy margins and tips on young apical leaves,
distorted margins on older leaves, which are pale,
yellow, small. Plant is stunted, with shortened
internodes, few or no fruits.
Caused stunting and decline on
Asparagus
officinalis
plants. Virus is transmitted by pollen
to the seed and to the pollinated plant.
