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| 2. |  | ALVES, M. de A.; VILA NOVA, L. L. de M.; GUEDES, E. A. C.; CAMPECHE, D. F. B.; PEREIRA, L. A. Levantamento do fitoplancton no açude Manga Nova, Petrolina, PE. In: CONGRESSO NACIONAL DE BOTÂNICA, 59.; REUNIÃO NORDESTINA DE BOTÂNICA, 31.; CONGRESSO LATINOAMERICANO Y DEL CARIBE DE CACTÁCEAS Y OTRAS SUCULENTAS, 4.; CONGRESS OF INTERNATIONAL ORGANIZATION FOR SUCULENT PLANT STUDY, 30., 2008, Natal. Atualidades, desafios e perspectivas da botânica no Brasil: anais. Natal: UFERSA: UFRN: SBB, 2008. 1 CD-ROM.| Biblioteca(s): Embrapa Semiárido. |
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| 3. | | CAMPECHE, D. F. B.; PEREIRA, L. A.; FIGUEIREDO, R. A. C. R.; PAULINO, R. V.; ALVES, M. A.; NOVA, L. L. M. V.; GUEDES, E. A. C. Limnological parameters and phytoplakton in fishponds with tambaqui, Colossoma macropomum (Cuvier, 1816) in the semi-arid region. Acta Limnologica Brasiliensia, Rio Claro, v. 21, n. 3, p. 333-341, 2009.| Biblioteca(s): Embrapa Semiárido. |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Mandioca e Fruticultura. Para informações adicionais entre em contato com cnpmf.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
31/10/2011 |
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Data da última atualização: |
26/05/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
GONÇALVES, F. P.; LOURENÇO, S. A.; STUCHI, E. S.; HAU, B.; AMORIM, L. |
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Afiliação: |
FABRÍCIO PACKER GONÇALVES, ESALQ; SILVIA AFONSECA LOURENÇO, ESALQ; EDUARDO SANCHES STUCHI, CNPMF; BERNHARD HAU, Hannover University; LILIAN AMORIM, ESALQ. |
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Título: |
Comparative analysis for quantification of citrus variegated chlorosis in the field. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Scientia Agricola, Piracicaba, Braz., v. 68, n. 5, p. 562-565, September/October 2011. |
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ISSN: |
0103-9016 |
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Idioma: |
Inglês |
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Conteúdo: |
Citrus Variegated Chlorosis (CVC) caused by Xylella fastidiosa is one of the most important diseases for Brazilian citriculture. The CVC is a vascular disease with a long incubation period and symptoms similar to other disorders, and this factors difficult the CVC quantification in the field. Two methods of CVC assessment were compared in this study. The first method was based on a descriptive rating scale with four ratings, commonly used for the disease quantification. The second one was based on the incidence of symptomatic branches. The quantification of CVC through these two methods was carried out in a 10-year-old 'Natal' sweet orange orchard. The descriptive scale considered the symptoms of the entire plant. The disease incidence was evaluated in 36 branches in each plant. The assessments were conducted by three raters in 144 plants in July 2006 and July 2007 as well as in March and November 2008. The descriptive scale did not allow an accurate assessment and resulted in a moderate strength of agreement among the raters. On the other hand, the incidence quantification of CVC through the symptomatic branches showed high repeatability among the raters. We suggest the use of incidence of symptomatic branches as variable for CVC quantification. |
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Palavras-Chave: |
CVC. |
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Thesagro: |
Doença de Planta. |
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Categoria do assunto: |
O Insetos e Entomologia |
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Marc: |
LEADER 01881naa a2200205 a 4500
001 1904478
005 2023-05-26
008 2011 bl uuuu u00u1 u #d
022 $a0103-9016
100 1 $aGONÇALVES, F. P.
245 $aComparative analysis for quantification of citrus variegated chlorosis in the field.$h[electronic resource]
260 $c2011
520 $aCitrus Variegated Chlorosis (CVC) caused by Xylella fastidiosa is one of the most important diseases for Brazilian citriculture. The CVC is a vascular disease with a long incubation period and symptoms similar to other disorders, and this factors difficult the CVC quantification in the field. Two methods of CVC assessment were compared in this study. The first method was based on a descriptive rating scale with four ratings, commonly used for the disease quantification. The second one was based on the incidence of symptomatic branches. The quantification of CVC through these two methods was carried out in a 10-year-old 'Natal' sweet orange orchard. The descriptive scale considered the symptoms of the entire plant. The disease incidence was evaluated in 36 branches in each plant. The assessments were conducted by three raters in 144 plants in July 2006 and July 2007 as well as in March and November 2008. The descriptive scale did not allow an accurate assessment and resulted in a moderate strength of agreement among the raters. On the other hand, the incidence quantification of CVC through the symptomatic branches showed high repeatability among the raters. We suggest the use of incidence of symptomatic branches as variable for CVC quantification.
650 $aDoença de Planta
653 $aCVC
700 1 $aLOURENÇO, S. A.
700 1 $aSTUCHI, E. S.
700 1 $aHAU, B.
700 1 $aAMORIM, L.
773 $tScientia Agricola, Piracicaba, Braz.$gv. 68, n. 5, p. 562-565, September/October 2011.
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