Biology Reference
In-Depth Information
Bean Common Mosaic Potyvirus
Bean Yellow Mosaic Potyvirus
Distributed worldwide in common beans wher-
ever they are grown. Many strains of the virus
were distinguished. They are transmitted by vec-
tors, sap, pollen and seed. Virus is serologically
related to 17 other Potyviruses.
Mild Mosaic of Gladiolus. On beans, peas, sweet
peas, clover, Tahitian bridal veil, gladiolus, false
lupine, and freesia. In beans there is a coarse
yellow mottling and distortion of leaves, which
are pointed downward; proliferation of stems;
shortening of nodes and general stunting; reduced
pod production; delayed maturity. In pea and
sweet pea there is veinal chlorosis, with slight
ruffling. Gladiolus flowers are striped or flecked,
young leaves have an angular green mottling, but
symptoms are mild compared with the disease on
beans and freesia, which should not be planted
near gladiolus and clovers. The virus is transmit-
ted by bean and pea aphids but not through seed.
Rogue infected plants as soon as noticed.
Bean Mosaic ¼ Bean Common Mosaic
Potyvirus
Found wherever beans are grown, transmitted by
many species of aphids - pean, cotton, cowpea,
cabbage, peach, spirea, turnip - and in seed. First
leaves are crinkled, stiff, chlorotic; older leaves
have chlorotic mottling, often with leaf margins
rolled down. Mosaic-resistant varieties include
Robust, Great Northern, U.S. No. 5 Refugee,
Idaho Refugee, and Wisconsin Refugee.
A strain known as bean greasy pod virus causes
a greasy appearance of the pods in some western
states. The asparagus-bean mosaic is a light and
dark green mosaic with leaf rolling transmitted by
seed and by the pea aphid. The virus may be
a strain of bean mosaic virus or a different virus.
Bean Yellow Stipple
Cowpea
Chlorotic Mottle Bromovirus
¼
Mild mottle and chlorotic spots on bean leaves,
sometimes coalescing.
Beet 2 Alphacryptovirus
Bean Leaf Roll Luteovirus
Transmitted only by pollen and seeds.
Legume virus transmitted by aphids.
Beet Black Scorch
Bean Pod Mottle Comovirus
Necrovirus, Tombusriridae. Reported in Colorado.
Systemic mottling in some varieties; circular,
light brown local lesions on pods of other varie-
ties. May also be seed transmitted in soybean.
Beet Curly Top Hybrigeminivirus
Confined to North America, curly top is espe-
cially important in the commercial sugar beet
industry west of the Continental Divide, but it is
common on many plants. Vegetables include
bean, beet, carrot, celery, cabbage and other
crucifers, cucumber, melon, squash, pumpkin,
eggplant, spinach, chard, New Zealand spinach,
horseradish, and tomato. Ornamentals include
Bean Southern Mosaic Sobemovirus
Chlorotic mottling or localized necrosis of foliage;
pods with dark green blotches or shiny areas,
slightly malformed, short, curled at end. Virus
present in new seed but not in that stored 7 months.
