Data/hora: 08/06/2024 13:46:30

Biblioteca(s): 	Epagri-Sede.	
Tipo da produção científica: 	Artigo em Anais de Congresso / Nota Técnica	
Data corrente: 	05/09/2023	
Data da última atualização: 	05/09/2023	
Autoria: 	RESENDE, R. S.; ARAÚJO, E. R.	
Título: 	Efficacy of bactericides for management of bacterial bulb rot in onion, Brazil, 2020-21.	
Ano de publicação: 	2023	
Fonte/Imprenta: 	Plant Disease Management Reports, Saint Paul, MN, v. 17, 2023.	
Idioma: 	Inglês	
Conteúdo: 	Onion is one of the most widely consumed vegetables worldwide, and bacterial bulb rot can cause significant yield losses in the field and during storage. To address this issue, field plots were established in 2020 at the Epagri Experimental Station (EPAGRI) in Ituporanga, Santa Catarina, Brazil, to evaluate the effectiveness of bactericide treatments in managing bacterial bulb rot diseases. The onion cultivar SCS373-28, Valessul, was manually transplanted into an experimental field with a previous history of Pantoea ananatis and Burkholderia gladioli pv. alliicola. Each plot was 3 m wide (with 33 cm between rows) by 2.75 m long (with 10 cm between plants) and had a 1 m buffer zone between each plot, containing approximately 243 plants per plot. The trial was arranged in a randomized complete block design with four replications. Treatments were applied eight times at 7-day intervals, starting at the bulb initiation stage, which occurred approximately 75 days after transplantation. Each treatment was applied using a CO2 pressurized backpack sprayer at a volume of 500 L/ha. The harvesting was carried out 120 days after transplanting. Subsequently, approximately 175 bulbs from the central rows of each plot were field-cured for about 10 days, topped, size-graded, weighed, and inspected for bulb rot. The incidence of the disease was determined by cutting all soft bulbs longitudinally and calculating the percentage of bulbs with any visible rot relative to the total number of bulbs. The asymptomatic bulbs were stored in plastic boxes at a commercial onion storage facility for 100 and 180 days, followed by longitudinal cutting and inspection for bacterial rot. Marketable bulbs were considered those with a diameter of &#8805; 35 mm. The data obtained were subjected to analysis of variance (ANOVA), and treatment means were separated using Tukey?s test with 5% significance. The bactericide treatments did not show a significant effect on the incidence of bulb rot at harvest, as well as after storage for 100 and 180 days or on the marketable yield. No visual phytotoxicity symptoms were observed in the trial.	
Thesagro: 	Allium cepa; Burkholderia gladioli pv alliicola; Center rot; Pantoea ananatis; Slippery skin.	
Categoria do assunto: 	X Pesquisa, Tecnologia e Engenharia	
URL: 	http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_58564.pdf	
Registro original: 	Epagri-Sede (Epagri-Sede)	
Exemplares: 	Epagri-Sede - (108573-1) - UPC - AP - DD -  -  -  - DIS