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Cooperative
W Control of Curly Top in
W Vegetables and Ornamentals
Curly top, also known as western yellow blight,
is one of the most destructive diseases of vegetables
and ornamentals in New Mexico. Susceptible vegetables include tomato, bean, beet, carrot, chile,
cucumber, melon, squash, pumpkin, potato, and
spinach. Susceptible ornamentals include columbine, coreopsis, cosmos, daisy, marigold, pansy,
stock, and zinnia. Many other vegetables and ornamentals are susceptible.
Curly top in New Mexico is very destructive in
tomato, chile, and cucurbits. In any season, one-
fourth or more of any crop, field or home grown,
may be diseased. Occasionally, winter squash and
pumpkins are completely eliminated by curly top.
Cause
This disease is caused by a virus which is not
spread by seed, soil, or workers' hands. It must be
injected into plants by a small insect called the
sugarbeet leafhopper.
The sugarbeet leafhopper is pale green or yellow,
often with darker blotches. It is about 1/8 inch
long and has long slender hind legs that enable it to
jump quickly into the air. When flying, it looks like
a tiny white fly.
Severity of curly top each year is related to the
buildup of leafhoppers on range plants and weeds.
Prolonged wet periods during the winter support
growth of weeds that harbor the leafhoppers.
Mustards, pepper grass, Russian thistle, and iilaree
are known hosts of leafhoppers
Symptoms
The most noticeable symptom of curly top at
first is severe plant stunting. Many plants escape
the disease and may be quite healthy. But the final
result of the disease is a poor stand.
Guide 400 H-106
curled beet leaf
Nymph and adult leafhopper (Actual size is
about 1/8 inch long).
Branches and stems of affected plants are quite
stiff and erect. Leaves are frequently yellow,
leathery, and curled. Roots appear normal in the
early stages of the disease, but they begin to die
after a few weeks, and finally the entire plant dies.
Diseased tomato leaves curl upward and twist,
exposing the undersides. They gradually become
leathery and stiff and turn a dull yellow. The veins
may turn purplish. Affected bean leaves are severely
puckered and curl downward. Beet leaves curl
upward and have small, sharp bumps on the ventral
leaf veins.
Object Description
| Title | Control of curly top in vegetables and ornamentals |
| Series Designation | Guide 400 H-106 |
| Description | Guide containing brief information on the cause, symptoms, and control of curly top virus in plants. |
| Subject | Beet curly top virus (NAL); Beet curly top virus; |
| Creator | Shannon, Emroy L. |
| Date Original | 1977-08 |
| Digital Publisher | New Mexico State University Library |
| Rights | Copyright, NMSU Board of Regents. |
| Collection | NMSU Cooperative Extension Service and Agricultural Experiment Station Publications |
| Source | Scan produced from physical item held by the NMSU Library. |
| Type | Text |
| Format | image/tiff |
| Language | eng |
Page Description
| Title | Page 1 |
| Series Designation | Guide 400 H-106 |
| Subject | Beet curly top virus (NAL); Beet curly top virus; |
| Creator | Shannon, Emroy L. |
| Date Original | 1977-08 |
| Digital Publisher | New Mexico State University Library |
| Rights | Copyright, NMSU Board of Regents. |
| Collection | NMSU Cooperative Extension Service and Agricultural Experiment Station Publications |
| Digital Identifier | UAAPg00H1060001 |
| Is Part Of | Control of curly top in vegetables and ornamentals |
| Type | Text |
| Format | image/tiff |
| Language | eng |
| OCR | Cooperative W Control of Curly Top in W Vegetables and Ornamentals Curly top, also known as western yellow blight, is one of the most destructive diseases of vegetables and ornamentals in New Mexico. Susceptible vegetables include tomato, bean, beet, carrot, chile, cucumber, melon, squash, pumpkin, potato, and spinach. Susceptible ornamentals include columbine, coreopsis, cosmos, daisy, marigold, pansy, stock, and zinnia. Many other vegetables and ornamentals are susceptible. Curly top in New Mexico is very destructive in tomato, chile, and cucurbits. In any season, one- fourth or more of any crop, field or home grown, may be diseased. Occasionally, winter squash and pumpkins are completely eliminated by curly top. Cause This disease is caused by a virus which is not spread by seed, soil, or workers' hands. It must be injected into plants by a small insect called the sugarbeet leafhopper. The sugarbeet leafhopper is pale green or yellow, often with darker blotches. It is about 1/8 inch long and has long slender hind legs that enable it to jump quickly into the air. When flying, it looks like a tiny white fly. Severity of curly top each year is related to the buildup of leafhoppers on range plants and weeds. Prolonged wet periods during the winter support growth of weeds that harbor the leafhoppers. Mustards, pepper grass, Russian thistle, and iilaree are known hosts of leafhoppers Symptoms The most noticeable symptom of curly top at first is severe plant stunting. Many plants escape the disease and may be quite healthy. But the final result of the disease is a poor stand. Guide 400 H-106 curled beet leaf Nymph and adult leafhopper (Actual size is about 1/8 inch long). Branches and stems of affected plants are quite stiff and erect. Leaves are frequently yellow, leathery, and curled. Roots appear normal in the early stages of the disease, but they begin to die after a few weeks, and finally the entire plant dies. Diseased tomato leaves curl upward and twist, exposing the undersides. They gradually become leathery and stiff and turn a dull yellow. The veins may turn purplish. Affected bean leaves are severely puckered and curl downward. Beet leaves curl upward and have small, sharp bumps on the ventral leaf veins. |
