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APHIS-Approved Packing House Procedures for 

Elsinoë australis,

Causal Agent of Sweet Orange Scab (SOS)

A. Regulated fruit of Citrus spp. and Fortunella spp. from a SOS quarantined area can move 

interstate with a certificate to all States provided it has met all conditions of the SOS 

Federal Order and is treated as follows:

1. Washed, and

2. Brushed, and

3. Surface disinfested with at least one of the following treatments, and

Treatment: D301.75-11(a-1) — Chemical Treatment

Thoroughly wet the fruit for at least 2 minutes with a solution containing 200 parts 

per million sodium hypochlorite. Maintain the solution at a pH of 6.0 to 7.5. Must be 

applied in accordance with label directions. Treatment must be applied in 

accordance with label directions.

Treatment: D301.75-11(a-2) — Chemical Treatment

Thoroughly wet the fruit with a solution containing sodium o-phenyl phenate at a 

concentration of 1.86 to 2.0 percent of the total solution. If the solution has sufficient 

soap or detergent to cause a visible foaming action, wet for 45 seconds. If the solution 

does not contain sufficient soap to cause a visible foaming action, wet for 1 minute.

Treatment must be applied in accordance with label directions.

Treatment: D301.75-11(a-3) — Chemical Treatment

Thoroughly wet the fruit with a solution of 85 parts per million peroxyacetic acid 

(PAA) for at least 1 minute. Treatment must be applied in accordance with label 

directions.

4. Treated with label rates of imazalil and/or thiabendazole at the time of packing, and

5. Waxed

B. Regulated asymptomatic fruit of Citrus spp. and Fortunella spp., from a SOS quarantined 

area, can move interstate with a certificate to all States provided it has been inspected by 

an inspector, meets all other conditions of the SOS Federal Order, and is treated as

follows:

1. Washed, and

2. Brushed, and

3. Surface disinfested with an organic disinfestant, such as PAA or hydrogen dioxide

(also known as hydrogen peroxide). Treatments must be applied in accordance with 

label directions.
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C. Regulated fruit of Citrus spp. and Fortunella spp., from a SOS quarantined area, can move 

interstate with a limited permit to non-commercial citrus producing States provided it meets 

all other conditions of the SOS Federal Order, and is treated as follows:

1. Washed, and

2. Brushed, and

3. Surface disinfested with an organic disinfestant, such as PAA or hydrogen dioxide

(also known as hydrogen peroxide). Treatments must be applied in accordance with 

label directions.

D. Regulated fruit from SOS quarantined areas, that is destined for processing in acommercial

citrus-producing State outside the SOS quarantine area, may move under limited permit 

provided it meets all other conditions of the SOS Federal Order, and is treated as follows:

1. Washed, and

2. Brushed, and

3. Surface disinfested with one or more of the disinfestants listed in A3 above, or an 

organic disinfestant, such as PAA or hydrogen dioxide (also known as hydrogen 

peroxide). Treatments must be applied in accordance with label directions.

E. References

USDA APHIS PPQ. Treatment Manual. Sections D301.75-11 (a-1), (a-2), and (a-3). 

http://www.aphis.usda.gov/import_export/plants/manuals/ports/downloads/treatment_pdf/domest 

ic_treatments.pdf (last accessed, December 21, 2010).

USDA APHIS PPQ, 2010. The significance of Citrus spp. fruit as a pathway for the introduction 

or spread of Elsinoë australis, the organism that causes Sweet orange scab disease. Center for 

Plant Health Science and Technology, Plant Epidemiology and Risk Analysis Laboratory, 

Raleigh, NC, USA.

USDA APHIS PPQ, December 2010. Federal Domestic Quarantine Order. Elsinoë australis 

Bitanc. & Jenkins, Causal Agent of Sweet Orange Scab (SOS). 

https://www.aphis.usda.gov/plant-health/sweet-orange-scab

USDA APHIS PPQ, March 2011. Federal Domestic Quarantine Order. Elsinoë australis Bitanc. 

& Jenkins, Causal Agent of Sweet Orange Scab (SOS).

https://www.aphis.usda.gov/plant-health/sweet-orange-scab