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dc.creatorFreitas, Marcelo Loran de Oliveira-
dc.creatorPozza, Edson Ampélio-
dc.creatorSantos Neto, Helon-
dc.creatorPozza, Adelia Aziz Alexandre-
dc.creatorBelan, Leônidas Leoni-
dc.creatorSilva, Humberson Rocha da-
dc.creatorSouza, Paulo Estevão de-
dc.identifier.citationFREITAS, M. L. de O. et al. Copper formulations in bacterial blight control and toxic effects on coffee seedlings. Bioscience Journal, Uberlândia, v. 38, e38043, 2022. DOI: 10.14393/BJ-v38n0a2022-55641.pt_BR
dc.description.abstractBacterial blight of coffee (Pseudomonas syringae pv. garcae) is an important coffee disease and can be controlled using antibiotics and copper-based compounds. However, copper-based compounds raise doubts among coffee growers regarding bacterial blight control efficiency and phytotoxic potential. In this work, coffee plants were sprayed with different copper molecules in order to study their efficiency on bacterial blight control and the phytotoxic potential. Seven copper formulations, cuprous oxide, copper oxychloride, copper nitrate, copper hydroxide 1 (water-dispersible granules) and 2 (concentrated suspension), copper sulfate 1 (complexed with gluconic acid) and 2 (Bordeaux mixture) were studied. The copper formulations efficiency was compared with the antibiotic kasugamycin, saline solution, and control. In controlled environmental conditions of temperature, relative humidity, and photoperiod, coffee seedlings were sprayed with the treatments and after 24 hours they were inoculated with Pseudomonas syringae pv. garcae suspension. Disease incidence and severity assessments were performed in a 2-day interval during a 16-day period. Phytotoxicity incidence and severity, mapping, and quantification of copper on the leaf tissue surface, dried leaves weight, and total copper leaf content were assessed 16 days after pathogen inoculation. Data were submitted to the Scott-Knott test (p < 0.05). Cuprous oxide and copper sulfate 2 proved most efficient to bacterial blight control, causing lower phytotoxicity effect, best covering, and persistence on leaf tissues. Copper nitrate and copper sulfate complexed with gluconic acid were more phytotoxicity compared to other copper formulations.pt_BR
dc.publisherUniversidade Federal de Uberlândiapt_BR
dc.rightsAttribution 4.0 International*
dc.rightsacesso abertopt_BR
dc.sourceBioscience Journalpt_BR
dc.subjectChemical controlpt_BR
dc.subjectPseudomonas syringae pv. garcaept_BR
dc.subjectMancha aureolada - Controle químicopt_BR
dc.titleCopper formulations in bacterial blight control and toxic effects on coffee seedlingspt_BR
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