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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

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.

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: 10/6/2015
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