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Annex

Treatment: Remedial treatment options for rice for human consumption or processing

Effective 25 April 2020 to 24 February 2021

All pests and diseases are to be submitted to Operational Science Services (OSS) for identification and treatment advice. Inspections should be arranged to allow sufficient time for specimen delivery and preliminary identification by OSS. Delivery by client/ agent as per 3rd party sample movement protocol is an option during business hours in urgent cases.
Refer to the table below for remedial treatment options for rice:

Inspection outcome

Remedial treatment options

Khapra beetle suspected or found

Methyl bromide: 80g/m³; 48 hours; 21°C NAP
The methyl bromide rate required is 80g/m³ for 48 hours at 21°C and above at Normal Atmospheric Pressure (NAP) with an end point concentration at 48 hours of 20g/m³. Note: The fumigation must undergo a monitor at 24 hours to ensure a minimum concentration of 24g/m³.
For each 5ºC (or part of 5ºC) the temperature is expected to fall below 21ºC, 8g/m³ must be added to the dosage rate, unless otherwise specified by the Department of Agriculture, Water and the Environment. It is the minimum temperature during the course of the fumigation that is to be used for the calculation of the dose.
Methyl bromide fumigation for quarantine purposes is not permitted if the ambient minimum temperature falls below 10ºC.
Dosage compensation is not allowed where the ambient temperature is above 21ºC or below 10ºC.

Other live insects

Refer to OSS for appropriate treatment method. Other suitable treatment may include:

Methyl bromide: 32g/m³; 24 hours; 21ºC NAP
The methyl bromide rate required is 32g/m³ for 24 hours at 21ºC or above at Normal Atmospheric Pressure (NAP).
For each 5ºC (or part of 5ºC) the temperature is expected to fall below 21ºC, 8g/m³ must be added to the dosage rate, unless otherwise specified by the Department of Agriculture, Water and the Environment. It is the minimum temperature during the course of the fumigation that is to be used for the calculation of the dose.
Methyl bromide fumigation for quarantine purposes is not permitted if the ambient minimum temperature falls below 10ºC.
Dosage compensation is not allowed where the ambient temperature is above 21ºC or below 10ºC.
Cold storage
Store at -18°C for 7 consecutive days starting when the core temperature of the consignment reaches -18°C. A core temperature of -18°C must be maintained over 7 consecutive days.

Disease symptoms found

Secure goods until the disease is assessed by a biosecurity plant pathologist.

Other seeds found

Cleaning
Rice seed must be cleaned to remove contaminants. Following cleaning the seed must be re-sampled by a biosecurity officer and submitted to the department approved seed laboratory for analysis. The consignment must remain under biosecurity control pending the results of the analysis.
ISTA testing
The seed lot must be sampled and analysed for purity in accordance with ISTA rules at a department-approved laboratory. Please refer to the following: .
Hot moist air: 85°C; 48 hours
Hot moist air at not less than 85°C for not less than 48 hours (50% relative humidity) once the core temperature has been reached.
Note: Prior to moist heat treatment, all bags/ packaging impervious to moisture must be opened or adequately punctured to allow moist heat penetration.
Hot moist air: 95°C; 24 hours
Hot moist air at not less than 95°C for not less than 24 hours (50% relative humidity) once the core temperature has been reached.
Note: Prior to moist heat treatment, all bags/ packaging impervious to moisture must be opened or adequately punctured to allow moist heat penetration.

Other plant trash

Consider if cleaning (re-conditioning to remove the contaminants) is appropriate.

Soil found

Cleaning
Rice seed must be cleaned to remove soil contaminants. Following cleaning the seed must be re-sampled by a biosecurity officer and submitted to the department approved seed laboratory for analysis. The consignment must remain under biosecurity control pending the results of the analysis.
ISTA testing
The seed lot must be sampled and analysed for purity in accordance with ISTA rules at a department-approved laboratory. Please refer to the following: .
Gamma irradiation at 50kGray
Gamma irradiation at 50kGray (5Mrad) if appropriate.

Presence or absence of germ unclear (milled rice only)

Hot moist air: 85°C; 48 hours
Hot moist air at not less than 85°C for not less than 48 hours (50% relative humidity) once the core temperature has been reached. Note: Prior to moist heat treatment, all bags/ packaging impervious to moisture must be opened or adequately punctured to allow moist heat penetration.
Hot moist air: 95°C; 24 hours
Hot moist air at not less than 95°C for not less than 24 hours (50% relative humidity) once the core temperature has been reached. Note: Prior to moist heat treatment, all bags/ packaging impervious to moisture must be opened or adequately punctured to allow moist heat penetration.
Germination testing
The seeds must be tested to determine if they are non-viable (i.e. NIL germination). Test seeds for germination in accordance with ISTA rules at a department-approved laboratory. The seed lot must remain under biosecurity control pending results of the analysis.
Further processing
Puffing, milling or rolling into rice cakes or rice bubbles.

Paddy grain exceeds tolerance (milled rice only)

Hot moist air: 85°C; 48 hours
Hot moist air at not less than 85°C for not less than 48 hours (50% relative humidity) once the core temperature has been reached. Note: Prior to moist heat treatment, all bags/packaging impervious to moisture must be opened or adequately punctured to allow moist heat penetration.
Hot moist air: 95°C; 24 hours
Hot moist air at not less than 95°C for not less than 24 hours (50% relative humidity) once the core temperature has been reached. Note: Prior to moist heat treatment, all bags/packaging impervious to moisture must be opened or adequately punctured to allow moist heat penetration.
Cleaning
Rice seed must be cleaned to remove contaminants. Following cleaning the seed must be re-sampled by a biosecurity officer and submitted to a department-approved seed laboratory for analysis. The consignment must remain under biosecurity control pending the results of the analysis.

The centre of the rice is green (wild rice only)

Hot moist air: 85°C; 48 hours
Hot moist air at not less than 85°C for not less than 48 hours (50% relative humidity) once the core temperature has been reached. Note: Prior to moist heat treatment, all bags/ packaging impervious to moisture must be opened or adequately punctured to allow moist heat penetration.

Hot moist air: 95°C; 24 hours
Hot moist air at not less than 95°C for not less than 24 hours (50% relative humidity) once the core temperature has been reached. Note: Prior to moist heat treatment, all bags/ packaging impervious to moisture must be opened or adequately punctured to allow moist heat penetration.

Additional information: