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| Yuki,Valdir A.; Lourenção,André L.; Kuniyuki,Hugo; Betti,Juarez A.. |
| Since 1991, when the whitefly Bemisia argentifolii Bellows & Perring was first described in São Paulo, it dispersed rapidly to all the regions of Brazil. Although the high incidence of geminivirus is correlated with high population of this whitefly, the transmission efficiency of this insect is unknown. To determine whether the B. argentifolii is a vector of BGMV, two experiments were carried out. After an aquisition period of 24 hours on infected beans plants cv. Carioca 80, adults of the whitefly were transferred to seedlings of some cultivars, giving a period of inoculation of 24 hours. In the 1st experiment, the percentage of symptomatic plants were: 25.0% for Carioca 80, 21.0% for Moruna 80, 21.0% for Aeté, 75.0% for Preto and 26.3% for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Aleyrodidae; Whitefly-transmitted geminivirus. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80591998000400025 |
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| Lourenção,André L.; Yuki,Valdir A.; Alves,Sérgio B.. |
| The first observations on the presence of Bemisia tabaci biotype B (=B. argentifolii) in Brazil were made in the beginning of the 1990s in the State of São Paulo. from then on, that whitefly has spread out to other States. In the summer of 1997/98, B. tabaci biotype B reached Guaíra-Miguelopólis, an area of the State of São Paulo not yet infested, with high populations of the insect, mainly in soybean, cotton and vegetable crops. In the the first week of February 1998, during a survey in an abandoned field of soybean, an epizootic of Aschersonia cf. goldiana was verified on that whitefly in the whole area, with total infection of nymphs in the lower surface of the leaves. At the same date, in two other soybean fields of the region, the incidence of this... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Aleyrodidae; Bemisia argentifolii; Silverleaf whitefly; Biological control; Coelomycetes. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80591999000200020 |
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| Di Piero,Robson M.; Rezende,Jorge A.M.; Yuki,Valdir A.; Pascholati,Sérgio F.; Delfino,Miguel Angel. |
| Avaliou-se a transmissão de Passion fruit woodiness virus (PWV) por Aphis gossypii (Glover). Em dois experimentos independentes, o afídeo transmitiu o PWV para maracujazeiros com taxas de 75% e 100%, ao se depositarem oito e doze afídeos virulíferos por planta, respectivamente. No final dos testes, observaram-se, em algumas plantas de maracujá, formas ápteras e ninfas de A. gossypii, sugerindo a colonização dessas plantas pelo afídeo. Esse parece ser o primeiro relato da colonização de Passiflora edulis f. flavicarpa (Deneger) por uma espécie de afídeo. |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Afídeo; Relação não-persistente; Epidemiologia. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2006000100019 |
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