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Desenvolvimento de imaturos de Dilobopterus costalimai Young, Oncometopia facialis (Signoret) e Homalodisca ignorata Melichar (Hemiptera: Cicadellidae) em citros Anais da SEB
Almeida,Rodrigo P.P.; Lopes,João R.S..
The development of immature stages on citrus seedlings was studied for the sharpshooter leafhoppers Dilobopterus costalimai Young, Oncometopia facialis (Signoret) and Homalodisca ignorata Melichar. The former two species are vectors of Xylella fastidiosa to citrus. Eggs of the three species are laid underneath the epidermis in the abaxial leaf surface. The Proconiini species (O. facialis and H. ignorata) coat their eggs with a whitish powder. Mean egg incubation periods at 25±2(0)C were 11.8 and 9.5 days for D. costalimai and O. facialis, respectively. Nymphal development was observed under fluctuating temperatures in a greenhouse after confining newly hatched first-instar leafhoppers on seedling stems inside leaf cages (54x42x12 mm). Five instars were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Insecta; Auchenorrhyncha; Cicadellinae; Leafhopper vectors; Citrus sinensis.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80591999000100020
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Feeding site preference of Dilobopterus costalimai Young and Oncometopia facialis (Signoret) (Hemiptera: Cicadellidae) on citrus plants Neotropical Entomology
Marucci,Rosangela C.; Lopes,João R.S.; Vendramim,José D.; Corrente,José E..
The efficiency of Xylella fastidiosa transmission by sharpshooters on citrus plants is low and varies with the vector species. The feeding behavior of the sharpshooter vector related to X. fastidiosa acquisition and inoculation is one of the probable conditioning factors in transmission efficiency. The objective of this study was to assess the behavior of two sharpshooter species, Dilobopterus costalimai Young and Oncometopia facialis (Signoret), in selection of citrus nursery trees and feeding places and to ascertain the influence of sprouting on plant attractiveness to the vectors. Free choice tests were performed with the two species in observation chambers (63 x 63 x 120 cm), releasing 40 individuals per chamber. The number of dead insects were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Citrus sinensis; Citrus variegated chlorosis; Sharpshooter vector; Host selection.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2004000600014
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Geostatistical characterization of the spatial distribution of Xylella fastidiosa sharpshooter vectors on citrus Neotropical Entomology
Farias,Paulo R.S.; Roberto,Sérgio R.; Lopes,João R.S.; Perecin,Dilermando.
The spatial distribution of the three principal species of sharpshooter (Dilobopterus costalimai Young, Acrogonia sp. e Oncometopia facialis Signoret), vectors of Xylella fastidiosa causal agent of Citrus Variegated Chlorosis, was studied by using geostatistics. The evaluations were carried out in a commercial 'Pera' sweet orange (Citrus sinensis [L.] Osb.) grove budded on Rangpur lime (Citrus limonia Osb.) located at Bebedouro, São Paulo state, aiming to establish better means for vector and disease control. The sharpshooters were monitored using with 50 uniformly distributed 3" x 5" yellow sticky traps hanging down in branches at 1.5 m up to the ground, which were replaced monthly. Acrogonia sp. was the prevalent species sampled. The results were used to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Citrus Variegated Chlorosis; Citrus sinensis; Semivariogram; Kriging.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2004000100004
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