Biology Reference
In-Depth Information
rings, more often elongated streaks on older
leaves. If leaves are killed prematurely, flowers
are fewer and smaller but normal in form and
color. No insect vector is known.
Panicum Mosaic Sobemovirus
On St. Augustine grass.
Orchid (Odontoglossum) Ring Spot
Tobamovirus
Papaya Mosaic Potexvirus
On Odontoglossum only. Small, necrotic spots
and rings on older leaves, light green to yellow
areas on young leaves. Leaves may turn yellow
and drop in 2 or 3 months or persist longer. There
are no flower symptoms; no insect vector is
known.
Caused mosaic
and stunting on Carica
papaya .
Papaya Ringspot Potyvirus
Symptoms on infected Carcia papaya plants
included mottling, malformation of leaves and
streaking on flowers and fruits.
Orchid (Oncidium) Ring Spot
On mature leaves of Oncidium ; round to irregu-
lar, slightly sunken yellow areas on both leaf
surfaces; becoming necrotic with age.
Pea Enation Mosaic Enamovirus
Orchid (Vanda) Ring Spot
On pea, sweet pea, broad bean, soybean and
sweet clover. Symptoms are yellowish spots on
leaves, which are later white, with crinkling and
savoying. Very susceptible varieties like
Alderman have necrotic spots and proliferations
or enations from underside of leaves. Pods may
be markedly distorted and twisted with seeds
small and yellow. Transmission is by pea, potato,
and peach aphids.
On 22 cultivated orchid species.
Ornithogalum Mosaic Potyvirus
On ornithogalum, galtonia, hyacinth,
lachenalia, agapanthus, hebe, fine light and
dark green leaf mottling becomes gray or yel-
low as leaves mature. Flower stalks are marked
with light and dark green blotches; there are thin
longitudinal streaks on perianth segments.
Transmission is by melon, peach, potato and
lily aphids.
Pea Mosaic Potyvirus
On pea, sweet pea, red clover and broad beans.
Sweet pea has leaf mottling, chlorosis, breaking
of flower color. Garden pea has vein clearing
followed by mottling or general chlorosis and
stunting. Transmission is by pea, peach and
bean aphids. Perfection and Horal varieties are
resistant
Palm Mosaic Potyvirus
Infected Washingtonia robusta plants showed
mosaics, ringspots and line pattern. Plants are
often stunted.
to this virus but not
to pea enation
mosaic.
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