![]() Because of its prevalence on the crop canopy, occurrence throughout the year (with peaks from February to August), and ability to colonize grapevines, H. Homalodisca spottii was observed feeding and mating on green branches of grapevines, in addition to egg masses. Even though they are not considered potential Xylella vectors, 2 Gyponini leafhoppers were collected: Curtara samera DeLong & Freytag, 1972 (11 specimens) and Curtara inflata DeLong & Freytag, 1976 (1 specimen). Only 1 cercopid specimen, belonging to Aeneolamia colon (Germar, 1821), was trapped. Hortensia similis (Walker, 1851) (2 specimens) was the only Cicadellini species. A total of 4,095 specimens of sharpshooters were collected, nearly all from 3 Proconiini species, Homalodisca spottii Takiya, Cavichioli & McKamey, 2006 (96.8% of the specimens), Tapajosa fulvopunctata (Signoret, 1854) (3.1%), and Tretogonia cribrata Melichar, 1926 (1 specimen). were sampled fortnightly from June/2005 to June/2007, using yellow sticky cards, each placed at two different heights (45 cm aboveground and 45 cm above the crop canopy) in 10 sampling localities. fastidiosa was conducted in vineyards at the São Francisco River Valley, a major grape growing region in Brazil. In this study, a survey of potential sharpshooter (Hemiptera, Cicadellidae, Cicadellinae) and spittlebug (Hemiptera, Cercopidae) vectors of X. Pierce's disease of grapevines, caused by Xylella fastidiosa, is a serious problem in some regions of North America, not yet reported in Brazil. Survey of potential sharpshooter and spittlebug vectors of Xylella fastidiosa to grapevines at the São Francisco River Valley, Brazil. , Empresa Brasileira de Pesquisa Agropecuária, Centro Nacional de Pesquisa de Uva e Vinho, Brasil, About the authors , Empresa Brasileira de Pesquisa Agropecuária, Centro de Pesquisa Agropecuária do Trópico Semi-árido, Brasil, Marcos Botton , Universidade de Caxias do Sul, Campus Universitário da Região dos Vinhedos, Centro de Ciências Exatas, da Natureza e de Tecnologia, Brazil, Beatriz Aguiar Jordão Paranhos , Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Departamento de Entomologia e Acarologia, Brazil, Wilson Sampaio de Azevedo-Filho , Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Departamento de Entomologia e Acarologia, Brazil, Cristiane Müller In corn and soybeans, where this sharpshooter was observed with regular frequency this year, it may be feeding on these plants, but it has not caused any known damage or disease transmission., Empresa Brasileira de Pesquisa Agropecuária, Centro Nacional de Pesquisa de Mandioca e Fruticultura, Brasil, João Roberto Spotti Lopes Pierce’s disease is a deadly debilitating disease of grapevines. The broad-headed sharpshooter has potential importance in grapes because it can serve as a vector of the bacterium Xylella fastidiosa, the causal agent of Pierce’s disease on grapes. This insect uses tiny piercing mouthparts to suck juices from plants. ![]() This insect also has modified hind legs that allow it to jump rapidly when disturbed. It has two pairs of large protruding compound eyes, and it is 1.1 to 1.3 cm (0.43 to 0.51 inch) in length. This combination of contrasting colors stands out with the green background of the foliage (Figures 1, 2 and 3). The broad-headed sharpshooter has a yellow head and scutellum (shield shaped portion of the thorax), and a bright bluish color on the dorsal anterior part of the thorax and the forewings. The broad-headed sharpshooter on a corn leaf (Photo: Raul Villanueva, UK)
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