Erythroneura comes
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Author(s): Kevin R. Jarrell et al.
Source: Journal of Integrated Pest Management (2020), vol. 1
Erythroneura comes (Say, 1825) - (eastern grape leafhopper)
This leafhopper is found in eastern and central parts of North America. It breeds mainly on grapevines, less frequently on other plants like Rubus or Aesculus. On grapevine, it feeds usually on the lower leaf surface, sucking out the mesophyll cells. Heavy infestations lead to chlorosis, premature leaf drop, stunting, and lower yield. During outbreaks the quality of the harvested grapes is also reduced, especially if the outbreak occurs early in the season. The grapes of affected vines have a low sugar content and high acidity.
The adult hoppers overwinter under leaf litter or other debris. In the spring they start feeding on the newly emerging leaves. Oviposition starts about 2 weeks later, and eggs are inserted individually into the leaves. The development from nymphs to adults depends on the temperature. In cooler regions, there is only one generation per year, but up to 3 or 4 in warmer areas. In autumn, the adults disperse and search for a suitable overwintering site.
There are several, similar looking Erythroneura species feeding on grapevine. These have to be separated by the structure of the male genitalia. E. comes adults have a length of 2.7-3 mm. They are whitish with a red or orange colour pattern.
For a review see Jarrell et al. (2020).
