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Incidence of Diaphorina citri Carrying Candidatus Liberibacter asiaticus in Brazil's Citrus Belt.
Wulff, Nelson A; Daniel, Bruno; Sassi, Rodrigo S; Moreira, Alécio S; Bassanezi, Renato B; Sala, Ivaldo; Coletti, Daniela A B; Rodrigues, Júlio C.
Afiliação
  • Wulff NA; Fundo de Defesa da Citricultura-FUNDECITRUS-Araraquara, São Paulo 14807-040, Brazil.
  • Daniel B; Fundo de Defesa da Citricultura-FUNDECITRUS-Araraquara, São Paulo 14807-040, Brazil.
  • Sassi RS; Professional Master Program on Citrus Diseases and Pest Control (MasterCitrus)/FUNDECITRUS-Araraquara, São Paulo 14807-040, Brazil.
  • Moreira AS; Professional Master Program on Citrus Diseases and Pest Control (MasterCitrus)/FUNDECITRUS-Araraquara, São Paulo 14807-040, Brazil.
  • Bassanezi RB; Embrapa Cassava & Fruits, Cruz das Almas BA 44380-000, Brazil.
  • Sala I; Fundo de Defesa da Citricultura-FUNDECITRUS-Araraquara, São Paulo 14807-040, Brazil.
  • Coletti DAB; Fundo de Defesa da Citricultura-FUNDECITRUS-Araraquara, São Paulo 14807-040, Brazil.
  • Rodrigues JC; Fundo de Defesa da Citricultura-FUNDECITRUS-Araraquara, São Paulo 14807-040, Brazil.
Insects ; 11(10)2020 Oct 03.
Article em En | MEDLINE | ID: mdl-33022967
Huanglongbing (HLB) is a citrus disease of worldwide importance, associated with the presence of Candidatus Liberibacter asiaticus (Las) and vectored by the psyllid Diaphorina citri in Asia and the Americas. To properly manage HLB, removal of inoculum sources and control of the psyllid are undertaken. We evaluated the percentage of the psyllid population with Las, sampled from yellow sticky traps over a three-year period and its relationship with insect population, regions, season of the year, and HLB management in citrus areas in the southwestern, central, and northern regions of São Paulo (SP) and southwestern region of Minas Gerais states, Brazil. In each reading, up to 50 psyllids per region were collected and detection of Las in individual psyllids were made by quantitative polymerase chain reaction. The percentage of psyllids with Las-an average of 65.3%-was constant throughout the year in the southwestern region of SP state, while showing an increase from spring to autumn when sampled from central to northern regions. The proportion of psyllids carrying Las from each region and year period were compared by a proportion test and spectral density analysis. The proportion of psyllids carrying Las evaluated in the same region in different seasons presented statistical differences in central (Araraquara) and southwestern (Santa Cruz do Rio Pardo) regions in 2015, with higher values in the first semester (summer and autumn) than in the second semester (winter and spring). Orchards with poor HLB management had higher incidence of psyllids with Las. Spectral density analysis indicated that good management areas had 50% less relevant peaks of psyllids with Las than in areas with poor HLB management practices. The relationship between the percentage of psyllids carrying Las and the number of captured psyllids in the region in a given time denotes the most critical intake time for HLB spread in citrus orchards. The reduction in the population of psyllids carrying Las is a direct benefit from the use of good management practices.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Incidence_studies / Risk_factors_studies País/Região como assunto: America do sul / Brasil Idioma: En Revista: Insects Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Brasil País de publicação: Suíça

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Incidence_studies / Risk_factors_studies País/Região como assunto: America do sul / Brasil Idioma: En Revista: Insects Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Brasil País de publicação: Suíça