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1 October 2008 Fate of a Genetically Modified Bacterium in Foregut of Glassy-Winged Sharpshooter (Hemiptera: Cicadellidae)
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Abstract

Symbiotic control is a new strategy being investigated to prevent the spread of insect-transmitted pathogens by reducing vector competence. We are developing this strategy to reduce the spread of Xylella fastidiosa by Homalodisca vitripennis (Germar) [formerly Homalodisca coagulata (Say)] (Hemiptera: Cicadellidae), the glassy-winged sharpshooter. In this study, the fate of a transformed symbiotic bacterium, Alcaligenes xylosoxidans variety denitrificans (S1Axd), in the foregut of glassy-winged sharpshooter when fed on citrus (Citrus spp.) and grape (Vitris spp.) was assessed. TaqMan-based quantitative real-time polymerase chain reaction (PCR) was used to detect and quantify bacterial cells remaining in the foregut at 0, 2, 4, 9, and 12 d after acquisition. S1Axd titer dropped rapidly by 2 d after acquisition, but in spite of this, at end of the 12-d experimental period, 45 and 38% of the glassy-winged sharpshooters retained the transformed bacteria, when fed on grape and citrus, respectively.

José L. Ramirez, Thomas M. Perring, and Thomas A. Miller "Fate of a Genetically Modified Bacterium in Foregut of Glassy-Winged Sharpshooter (Hemiptera: Cicadellidae)," Journal of Economic Entomology 101(5), 1519-1525, (1 October 2008). https://doi.org/10.1603/0022-0493(2008)101[1519:FOAGMB]2.0.CO;2
Received: 6 July 2007; Accepted: 6 October 2007; Published: 1 October 2008
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