Biocontrol of postharvest Alternaria decay in table grapes from Argentina

Authors
Stocco, Antonella Fabia; Diaz, Mariano Emanuel; Rodriguez Romera, Mariela Carmen; Mercado, Laura Analia; Rivero, Maria Laura; Ponsone, María Lorena
Publication Year
2019
Language
English
Format
article
Status
Versión aceptada para publicación
Description
Postharvest diseases cause considerable losses of fruit during transportation and storage. Synthetic fungicides are primarily used to control them; however, the recent trend is to shif toward safer and more eco-friendly alternatives for the control of postharvest decays. In Argentina, Alternaria genus was cited as a postharvest pathogen in table grapes for the first time during 2010-2012 seasons. The aim of this study was to identify by morphological and molecular techniques Alternaria spp. strains isolated from table grapes cv. Red Globe in different phenological stages of vine and postharvest storage in Mendoza region. In addition, we intended to propose an alternative postharvest management to the use of sulphur dioxide (SO2) generators (traditional method). We searched for a lower environmental impact substitute; using the yeast strain Metschnikowia pulcherrima RCM2 and chitosan coatings as possible control agents. The results showed that the pathogen was present in all the stages studied and it was determined that the 100% of the strains belonged to the species-group Alternaria alternata. On the other hand, chitosan coatings showed to be a good alternative method to SO2 generators. This is the first study, to our knowledge, about Alternaria spp. incidence during the phenological cycle and postharvest storage of table grapes cv. Red Globe; and also the first study about the evaluation of alternative strategies to the use of SO2 for the control of this disease during the prolonged cold storage.
EEA Mendoza
Fil: Stocco, Antonella Fabia. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mendoza. Laboratorio de Postcosecha; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Diaz, Mariano Emanuel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mendoza. Laboratorio de Postcosecha; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Rodriguez Romera, Mariela Carmen. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mendoza; Argentina
Fil: Mercado, Laura Analia. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mendoza; Argentina
Fil: Rivero, Maria Laura. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mendoza; Argentina
Fil: Ponsone, María Lorena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mendoza. Laboratorio de Postcosecha; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina
Source
Biological Control 134 : 114-122 (July 2019)
Subject
Vid
Uvas de Mesa
Enfermedades de las Plantas
Alternaria
Enfermedades Postcosecha
Control Biológico
Grapevines
Dessert Grapes
Plant Diseases
Postharvest Decay
Biological Control
Argentina
Access level
Restricted access
License
Repository
INTA Digital (INTA)
Institution
Instituto Nacional de Tecnología Agropecuaria
OAI Identifier
oai:localhost:20.500.12123/4884