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Grape
leafhopper
Rufus
Isaacs, MSU Entomology |
| Home > Scouting guide> grape leafhopper |
| Grape leafhopper
adults are orange-yellow with some dark spots and yellow lines on
the forewings and about 1/8 inch long. Grape leafhopper has 1.5 to
2 generations per year, with peak abundance of adults occuring in
late July and again in late August. Adults overwinter in leaf litter
in or around vineyards and feed on weeds as temperatures exceed 60°F
(16°C) in the spring.
After mating,
they move to young grape foliage in late May and early July to lay
clear, crescent-shaped eggs inside the leaves. First generation
eggs hatch in mid- to late June, and the flightless nymphs take
a month to develop into adults. Cold, wet springs and winters are
damaging to leafhoppers. |
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| Grape
leafhopper adult. 3mm. |
Grape
leafhopper nymph. |
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| Sampling
for grape leafhopper |
| In labrusca
vines, growers can sample for grape leaf-hopper in the third week
of July to determine the need for management. Examine 100 leaves
across two edge and two interior vine-yard sites. At each site,
inspect five leaves (leaves 3 to 7) on one shoot of five vines to
determine whether the leaves are showing any white/yellow stippling
on the upper leaf surface. If more than 10 leaves of the 100 show
damage, apply an appropriate control for the leafhoppers. If populations
are only at the vineyard edges, consider area-specific management.
Insecticides applied for grape berry moth may control grape leafhopper
as well. |
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| Early
signs of damage include stippling along leaf veins. |
Severe
damage includes necrosis on leaves and premature water stress. |
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| Comparison
of grape and potato leafhoppers |
| Character |
Grape
leafhopper |
Potato
leafhopper |
| Color |
Light
yellow |
Green-yellow |
| Behavior |
Walks
forward |
Walks
sideways |
| Postition
on vine |
On
inner canopy leaves |
On
leaves on ends of shoots |
| Most
susceptible |
Labrusca
grapes |
Vinifera
and hybrid grapes |
| Damage
symptoms |
Stippling
on leaf surface, becoming red/brown when severe. |
Leaf
yellowing and cupping on wine grapes. Stippling on juice grape
leaves. |
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| Other
leafhoppers |
| Threebanded leafhopper, Erythroneura tricincta, and Virginia creeper leafhopper, Erythroneura ziczac, can both be found in eastern U.S. vineyards. Their biologies are similar to that of grape leafhopper. The threebanded leafhopper adult is brown and black with some orange flecks on the wings. The Virginia creeper leafhopper adult is pale yellowish or white with a zigzag stripe down each wing and distinctly red cross-veins. |
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Site map About us Copyright/Linking |
Funding for this web site provided by Project GREEEN, American Farmland Trust, EPA Region 5's Strategic Agricultural Initiative program, The National Foundation for IPM Education, the Center for Agricultural Partnerships and the MSU Integrated Pest Management Program
in collaboration with MSU Extension and the Michigan Agricultural Experiment Station.
Updated 12/20/07 Contact: J.N. Landis. |
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