Biology Reference
In-Depth Information
Pea Mottle
Peach Golden Net
Pea Mottle caused by Clover Yellow Mosaic
Potexvirus and Clover Yellow Vein Potyvirus.
Fairly widespread on garden pea, snapbean,
white clover and broad bean. On pea a severe
systemic mosaic may be fatal. Some plants have
chlorotic mottling of leaves and stipules, but
stems, pods, and seeds are normal. Bean and pea
aphids are probably vectors.
Probably identical with line pattern.
Peach Little Peach
Related to peach yellows, and in same host range,
eastern United States.
Peach Mosaic
Pea Streak Carlavirus
In Southwest on peach, apricot, nectarine, plum
and capable of infecting almond. Spring growth
of peach has short internodes, with sometimes
flower breaking, chlorotic mottling, and foliage
distortion early in the season, with masking of
symptoms or dropping out of affected areas in
midsummer. Fruit is small, irregular in shape,
unsalable. Apricot stones have white rings and
blotches. Transmission is by budding, grafting, a
mite (
Eriophyes insidiosus
), and perhaps the plum
aphid. Removal of infected trees, nursery inspec-
tion and quarantine reduce the incidence of mosaic.
Light brown to purple, oblong, necrotic lesions
are scattered along stems and petioles with stems
often girdled. Leaves and pods are roughened
with light brown necrotic areas.
Pea Wilt
Causing severe streak in pea if pea-mottle virus is
also present.
Peach Asteroid Spot
Peach Mottle
Discrete, chlorotic lesions spread along veins
forming starlike spots;
some chlorophyll
is
Known only in Idaho.
retained in lesions as leaves turn yellow.
Peach Necrotic Leaf Spot
Peach Calico
On peach but with sweet cherry as a symptomless
carrier. Light brown, dead, membranous areas in
unfolding leaves fall out, leaving holes. The dis-
ease is recurrent on peach.
Leaves are first mottled, then yellowed, then
papery white. Creamy white streaks develop on
twigs. Fruit is shorter, rounder, with creamy
white to red patches. Transmission is by budding.
Peach Phony Disease
Peach Dwarf
The most important peach disease in the South-
east. Trees are dwarfed; foliage is abnormally
green, fruit small; there are flecks in wood, espe-
cially in roots. Phony trees have short terminal
and lateral
Only on Muir peach. Profusion of large, flat, dark
green leaves, closely appressed on short twigs;
witches' broom showing in dormant period; fruit
larger than normal, misshapen.
twigs; profuse lateral branching.
