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United States Department of Agriculture

Agricultural Research Service

Research Project: Effect of Nutritional Spray Programs on Huanglongbing (Hlb) Disease-Induced off-Flavor of Orange Fruit and Juice.

Location: Citrus and Other Subtropical Products Research

Project Number: 6034-41430-005-22
Project Type: Reimbursable

Start Date: Dec 13, 2012
End Date: Jan 31, 2015

Objective:
Evaluate juice quality from orange fruit (juice) harvested from groves treated with conventional spray programs compared to groves receiving various nutritional spray programs and determine components of off-flavors.

Approach:
Harvest fruit symptomatic and asymptomatic for Huanglongbing (HLB) disease from trees receiving conventional spray programs and various nutritional spray programs for comparison to healthy fruit/juice, as well as recover oil and determine quality by measuring chemical components along with sensory panels. When off-flavors are detected, determine causal components and establish flavor thresholds for these components using gas-chromatography-mass spectroscopy (GC-MS), electronic nose and tongue, high performance liquid chromatography (HPLC) – MS, and various types of sensory panels.

Last Modified: 11/28/2014
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