The 2005 ESA Annual Meeting and Exhibition
December 15-18, 2005
Ft. Lauderdale, FL

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Saturday, December 17, 2005

Beet leafhopper (Hemiptera: Cicadellidae) settling behavior, survival, and reproduction on selected host plants

Joseph Munyaneza, and Jeffrey Upton, USDA-ARS, 5230 Konnowac Pass Rd, Wapato, WA

Experiments were conducted to determine the settling behavior, survival, and reproduction of the beet leafhopper, Circulifer tenellus Baker, when maintained on selected host plants. This leafhopper was recently identified in the Columbia Basin of Washington and Oregon as the probable vector of the beet leafhopper transmitted virescence agent phytoplasma, causal agent of several vegetable crop diseases, including potato purple top. Plants selected for the study were sugar beet, radish, dry bean, potato, carrot, and tomato. Leafhopper adults were confined on caged plants. Settling behavior was observed for 72 hr and survival was monitored for 40 days. Also, oviposition and nymph production were investigated by maintaining leafhoppers for about 90 days on each of the selected plants. Leafhoppers settled readily on all studied plants during the first 4 hr but settling on bean and tomato declined sharply thereafter. Leafhopper mortality was very high on bean and tomato, with almost all the leafhoppers confined on bean dying in about a week. In contrast, there was no or little mortality to leafhoppers maintained on sugar beet, radish, and potato. Beet leafhopper oviposition and nymph production and development only occurred on sugar beet, radish, and potato. These data increase the understanding of how the beet leafhopper successfully transmits pathogens to plants, especially those that are not its accepted hosts.

Species 1: Hemiptera Cicadellidae Circulifer tenellus (Beet leafhopper)
Keywords: phytoplamas, viruses