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dc.contributor.authorMARTINS, M. V. V.pt_BR
dc.contributor.authorSILVEIRA, S. F.pt_BR
dc.contributor.authorMAFFIA, L. A.pt_BR
dc.contributor.authorROCABADO, J. M. A.pt_BR
dc.contributor.authorMUSSI-DIAS, V.pt_BR
dc.date.accessioned2011-09-20T11:11:11Zpt_BR
dc.date.accessioned2011-09-20T11:11:11Zpt_BR
dc.date.available2011-09-20T11:11:11Zpt_BR
dc.date.available2011-09-20T11:11:11Zpt_BR
dc.date.created2011-09-20pt_BR
dc.date.issued2011pt_BR
dc.identifier.citationAustralasian Plant Pathology, v. 40, n. 1, p. 48-54, 2011.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/900972pt_BR
dc.descriptionFungicides were evaluated under field conditions for their efficacy in the control of guava rust (Puccinia psidii); five systemic fungicides (azoxystrobin, pyraclostrobin, cyproconazole, tebuconazole, triadimenol) and the protectant mancozeb. In a first trial, the fungicides were applied at two-week intervals intercalated with bi-weekly sprays of copper oxychloride. The initial incidence of rust on flower buds before treatment was 47%. Triadimenol and azoxystrobin were most effective in reducing the incidence of rust on fruit. The minimum rust incidence achieved with triadimenol was 12% compared to 84% in the control treatment (water). The initial level of rust on flower buds was particularly high for the tebuconazole treatment, which may have contributed to the ineffective control by this fungicide in the first trial. In the second trial, copper oxychloride sprays were applied when disease incidence on flower buds was low (7%). Azoxystrobin, tebuconazole, triadimenol and mancozeb treatments were started nine days after a second application of copper oxychloride. The fungicides were then applied at bi-weekly intervals and at the same concentrations as in the first trial. Triadimenol was again most effective in controlling rust, although its effect did not greatly differ from that of tebuconazole. The maximum disease incidence in all fungicide treatments was significantly lower than that observed in the control treatment.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectYield lossespt_BR
dc.titleChemical control of guava rust (Puccinia psidii) in the Northern Region of Rio de Janeiro State, Brazil.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2017-05-02T11:11:11Zpt_BR
dc.subject.thesagroPsidium Guajavapt_BR
dc.subject.nalthesaurusfungicidespt_BR
riaa.ainfo.id900972pt_BR
riaa.ainfo.lastupdate2017-05-02pt_BR
dc.contributor.institutionMARLON VAGNER VALENTIM MARTINS, CNPAT; UENF; UFV.pt_BR
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