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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 #440974

Research Project: Breaking Critical Pest-Related Trade Barriers for California Citrus Exports: Systems Approach Evaluations

Location: Commodity Protection and Quality Research

Project Number: 2034-43000-043-041-R
Project Type: Reimbursable Cooperative Agreement

Start Date: Oct 1, 2021
End Date: Jun 30, 2022

Objective:
Develop novel postharvest treatments to control key pests in trade and marketing channels of fresh California citrus exports.

Approach:
Conduct research outlined in USDA-Foreign Agricultural Service grant #2020-05, Year 1, Phase 1: Four events in the citrus "system" will be evaluated at the commercial- scale: Event 1: ethyl formate (EF) fumigation - required for domestic ACP quarantine; Event 2: standard packing (washing, spraying, brushing, waxing, drying) ; Event 3: phosphine fumigation at pulp T > 40F for 12 h; and Event 4: 21-d shipping (37F and 45F for oranges and lemons, respectively). With respect to orange and lemon varieties not investigated in 2020 and produced under CDFA quarantine for ACP, we will quantify three systems scenarios (#1: E1'E2'E4; #2: E1'E2'E3; #3: E1' E2'E3'E4) relative to the control (C: E2'E4) for efficacy toward: bean thrips, flat mites, California red scale, Fullers rose beetle, and plant pathogens. Conduct general quality evaluation (decay, rind damage, color, brix, texture, acidity).