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ARS Home » Pacific West Area » Parlier, California » San Joaquin Valley Agricultural Sciences Center » Commodity Protection and Quality Research » Research » Research Project #438781

Research Project: Control of Postharvest Diseases of Table Grapes

Location: Commodity Protection and Quality Research

Project Number: 2034-43000-041-05-A
Project Type: Cooperative Agreement

Start Date: Sep 30, 2020
End Date: Jan 31, 2021

Objective:
Evaluate the effectiveness of postharvest treatments such as natamycin for control of gray mold in stored table grapes.

Approach:
The biofungicide, natamycin, applied as postharvest treatments using different application technologies will be evaluated for control of postharvest gray mold in table grapes. Freshly harvested table grapes will be brought to the laboratory and treated with natamycin by either dipping or fogging (a high-pressure spraying) the grape clusters. Different concentrations of natamycin will be tested. Part of the berries will also be inoculated with the pathogen. Grapes will be kept in cold storage and then evaluated for decay development. Impact of the treatments on grape cluster appearance will also be evaluated.