Annals of the Entomological Society of America (2006) 99, 1154-1164

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Elizabeth A. Boyd and Mark S. Hoddle (2006)
Oviposition and flight activity of the blue-green sharpshooter (Hemiptera: Cicadellidae) on southern California wild grape and first report of associated egg parasitoids
Annals of the Entomological Society of America 99 (6), 1154-1164
Abstract: Oviposition of Graphocephala atropunctata (Signoret) (Hemiptera: Cicadellidae), the blue-green sharpshooter, was assessed on wild grape, Vitis girdiana Munson, in southern California. Female blue-green sharpshooter preferred to oviposit into new growth, primarily succulent young grape tendrils and canes. The midrib and petioles of small grape leaves also were used for oviposition, but to a lesser extent. Mature canes, and medium- and large-sized leaves were not used for oviposition. Two parasitoids, Gonatocerus latipennis Girault and Polynema sp. (both Hymenoptera: Mymaridae) were reared from field collected blue-green sharpshooter eggs. Polynema sp. and G. latipennis constitute the first documented egg parasitoids of blue-green sharpshooter. Deployment of sentinel plants and reciprocal tests were implemented and further confirmed the parasitization of blue-green sharpshooter eggs by these two parasitoid species. Yellow sticky card trap catch of adult blue-green sharpshooter was significantly correlated to combined blue-green sharpshooter nymphal and Polynema sp. emergence in 2004, but not in 2005. A degree-day model was developed for onset of blue-green sharpshooter flight activity and emergence in the field.
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Database assignments for author(s): Elizabeth (Betsy) A. Boyd, Mark S. Hoddle

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
population dynamics/ epidemiology
Research topic(s) for beneficials or antagonists:

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Graphocephala atropunctata U.S.A. (SW)
Cosmocomoidea latipennis (parasitoid) Graphocephala atropunctata U.S.A. (SW)