Fecha/hora: 23/05/2024 13:41:51

Biblioteca(s): 	INIA Las Brujas.	
Fecha corriente: 	15/03/2022	
Fecha de la última actualización: 	15/03/2022	
Autoria: 	FERNÁNDEZ, G.; SBRES, M.; LADO, J.; PEREZ, E.	
Afiliación: 	GERÓNIMO FERNÁNDEZ, Unión de Productores y Exportadores de Fruta del Uruguay (UPEFRUY), Rincón 487, Montevideo, Uruguay; MAURICIO SBRES, Departamento de Química Orgánica, Laboratorio de Biotecnología de Aromas, Facultad de Química, Universidad de la República, General Flores 2124, Montevideo, Uruguay; JOANNA LADO LINDNER, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; ELENA PEREZ FAGGIANI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.	
Título: 	Postharvest sour rot control in lemon fruit by natamycin and an Allium extract.	
Año de publicación: 	2022	
Fuente/Imprenta: 	International Journal of Food Microbiology, 2022, Volume 368, Article number 109605. doi: https://doi.org/10.1016/j.ijfoodmicro.2022.109605	
ISSN: 	0168-1605	
DOI: 	10.1016/j.ijfoodmicro.2022.109605	
Idioma: 	Inglés	
Notas: 	Article history: Received 9 November 2021; Received in revised form 15 February 2022; Accepted 25 February 2022; Available online 1 March 2022.
Corresponding author:  Pérez-Faggiani, E.; Programa Nacional de Investigación en Producción Citrícola, Instituto Nacional de Investigación Agropecuaria (INIA), Camino al Terrible s/n, Casilla postal: 68033, Salto, Uruguay; email:elenaperez@inia.org.uy -- Funding text: We gratefully thanks to Ing. Agr Eduardo Blanco and Q. F. Miguel Castiglioni for providing the products tested in this study. We acknowledge UPEFRUY for their contribution in commercial experiments. This work was supported by the Agencia Nacional de Investigación e Innovacion (ANII-Uruguay) by the code RTS_1_2016_1_127275 and Instituto Nacional de Investigación Agropecuaria (INIA).	
Contenido: 	ABSTRACT. - Citrus sour rot caused by Geotrichum citri-aurantii is one of the most important postharvest diseases in citrus fruit, causing huge economic losses. Traditionally, it has been controlled by the postharvest application of guazatine and propiconazole fungicides, but restrictions in their use make it urgent to find an alternative for sour rot management. Natamycin, a common food preservative, and the organosulfuric compounds extracted from Allium species are safe food additives that control different foodborne pathogens. In the present study, the curative activities of commercial formulations of natamycin (Fruitgard Nat 20) and an Allium extract (PTSO: propyl thiosulfinate oxide; Proallium FRD®), were evaluated for the control of G. citri-aurantii in artificially inoculated lemon fruit. Trials in laboratory and in commercial conditions were carried out to explore the feasibility of including both compounds as part of a safe postharvest sour rot disease control strategy. Under controlled laboratory conditions, sour rot was significatively reduced by 500 mg L&#8722;1 of natamycin, 580 mL L&#8722;1 of PTSO and 290 mL L&#8722;1 of PTSO + 4% of a food coat, applied by immersion. Nevertheless, the maximum dose of PTSO (580 mL L&#8722;1) caused phytotoxicity on the fruit rind. In commercial drenching conditions, 290 mL L&#8722;1 of PTSO + 4% of a food coat reduced sour rot incidence similar to conventional treatment. In a packing line treatment, spray application of 500 mg L&#8722;1 of natamycin with a previous dip in sodium bicarbonate, resulted in nearly 70% reduction of disease incidence compared to conventional salt application. A second commercial experiment revealed that fruit drenching with 290 mL L&#8722;1 of PTSO + 4% food coat followed by an in-line cascade application of 500 mg L&#8722;1 of natamycin is completely effective for sour rot control after 20 days at 5 °C. Further exposure at room temperature for 7 d showed a 61% reduction in sour rot incidence compared to the control. Results revealed that natamycin and PTSO are promising tools for sour rot control used alone or combined as part of an integrated postharvest strategy. © 2022 Elsevier B.V.	
Palabras-Clave: 	Biofungicide; Food additives; Geotrichum citri-aurantii; GRAS.	
Categoría del tema: 	F01 Cultivo	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (103022-1) - PXI - AP - DD - Intern.Jr. Food Microbiology/2022 -  -  - DIS