OZONE AS A GASEOUS FUMIGANT - AGRICULTURAL RESEARCH SERVICE

Recipient Organization
AGRICULTURAL RESEARCH SERVICE
(N/A)
PARLIER,CA 93648

Performing Department
(N/A)

Non Technical Summary
(N/A)

Animal Health Component

80%

Research Effort Categories

Basic

20%

Applied

80%

Developmental

Classification

Knowledge Area (KA)	Subject of Investigation (SOI)	Field of Science (FOS)	Percent
503	0920	1130	10%
503	0930	1130	10%
503	1119	1130	10%
503	1130	1130	10%
503	1132	1130	20%
503	1213	1130	10%
503	1219	1130	10%
503	2299	1130	10%
503	3110	1130	10%

Knowledge Area
503 - Quality Maintenance in Storing and Marketing Food Products;

Subject Of Investigation
1119 - Deciduous tree fruits, general/other; 0920 - Orange; 2299 - Miscellaneous and new crops, general/other; 1213 - Walnut; 0930 - Lemon; 3110 - Insects; 1219 - Edible tree nuts, general/other; 1130 - Table grapes; 1132 - Raisin grapes;

Field Of Science
1130 - Entomology and acarology;

Goals / Objectives
Continue a project to evaluate ozone for use as a fumigant on fresh fruit and nuts to control pests of commodities following harvest. Acquire and fabricate test equipment, develop ozone detection methodology and establish the efficacy of various dosages of ozone to eliminate insects from several commodities. Determine if ozone has potential to replace current methodology in postharvest treatments. Establish the benefits and disadvantages of using ozone for postharvest treatments.

Project Methods
Insect pests of postharvest fresh fruit, dried fruits and nuts will be treated with ozone in air and the efficacy assessed. Commodities will be exposed to determine effects of ozone treatment on quality. Documents Reimbursable with UC-Davis. Log 17745. Formerly 5302-43000-027-02R (2/03).

Progress 01/01/00 to 12/31/04

Outputs
4d Progress report. This report documents research conducted under a Reimbursable Agreement between ARS and the University of California at Davis. Additional details of this research can be found in the report for the parent CRIS 5302-43000-030-00D Chemically Based Methods as Alternatives to methyl bromide for Postharvest and Quarantine Pests. With the withdrawal of methyl bromide as a fumigant because of its ozone depleting chemistry, new chemicals are being investigated as alternates for this important fumigant. Ozone was found to be effective in eliminating live adult bean thrips from the navel of Navel oranges for export to Australia. Previous results had determined that in order for the treatment to not damage the treated oranges, the oranges must have a wax and this year, tests were conducted with oranges waxed at various commercial packing houses. Results were variable and it was determined that not enough control was given in the commercial facilities so that variation could not be explained. These tests were conducted at the San Joaquin Valley Agricultural Sciences Center with the intent of developing parameters for establishing a schedule to fumigate oranges going to Australia. This research will make the export of Navel oranges easier to Australia.

Impacts
(N/A)

Publications

Progress 10/01/03 to 09/30/04

Outputs
4. What were the most significant accomplishments this past year? This report serves to document research conducted under a reimburseable agreement between ARS and the University of California Davis. Additional details of research can be found in the report for the parent project 5302-43000-030-00D Chemically Based Methods as Alternatives to Methyl Bromide for Postharvest and Quarantine Pests. Testing was conducted to eliminate a quarantine problem of the coffee berry borer being transported into non-infested areas of coffee-growing areas. All stages of the borer were tested using gaseous ozone. Good control was possible with all stages except the egg stage of the insect. Insects were exposed at 2000 - 10,000 ppm of ozone combined with 7-10% carbon dioxide and a vacuum of - 250 mm Hg. The egg stage was the most difficult to kill.

Impacts
(N/A)

Publications