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Proposals to Amend (No. 2) the New Zealand (Maximum Residue Limits of Agricultural Compounds) Food Standards 2008

6 Proposal to set MRLs for Mandipropamid

It is proposed that MRLs are set for mandipropamid when used as a fungicide for bulb and green onions. It is proposed that Schedule One of the NZ (MRL) Food Standards 2008 be amended to include:

NOTE: (*) indicates that the maximum residue limit has been set at or about the limit of analytical quantification.

The final entry for mandipropamid in Schedule One of the NZ (MRL) Food Standards 2008 will therefore read:

Amendment Rationale

The proposed MRLs represent new use patterns in New Zealand for the active ingredient mandipropamid. The proposed MRLs will manage the new uses of mandipropamid as a fungicide on bulb and green onions to the application rates and withholding periods that are approved good agricultural practice (GAP) in New Zealand (see below).

Chemical Information

Good Agricultural Practice

Bulb Onions: Mandipropamid is proposed for use as a fungicide for bulb onions. Application may be throughout active growth at 100-150gai/ha with a withholding period of 7 days.

Green Onions: Mandipropamid is proposed for use as a fungicide for green onions. Application may be throughout active growth at 100-150gai/ha with a withholding period of 14 days.

Residues Information

Residue data for bulb onions support a limit of quantification MRL of 0.0 mg/kg at 7 days after the last treatment. An MRL of 0.01mg/kg is therefore proposed to support GAP. Residue data for green onions support an MRL of 0.2mg/kg at 14 days after the last treatment. An MRL of 0.2mg/kg is therefore proposed to support GAP.

Animal Transfer: Residues are unlikely in animals consuming treated onions, therefore no animal commodity MRLs are proposed.

Dietary Risk Assessment

The potential daily exposure via food (PDE_(food))is used for dietary intake calculation where a value has been set. The potential daily exposure via food (PDE_(food)) is used for dietary intake calculation where a value has been set. The PDE_(food) is a value set by the Environmental Risk Management Authority (ERMA), and represents the proportion of the acceptable daily exposure to a substance via the food route as relevant to the New Zealand population. The methodology for calculation of these values is set out in the Hazardous Substances (Classes 6, 8, and 9 Controls) Regulations 2001 which can be found at: www.legislation.govt.nz.

The chronic dietary exposure to mandipropamid is estimated by the National Estimated Dietary Intake (NEDI) calculation encompassing all registered uses of the chemical and food consumption data based upon the 1997 National Nutritional Survey for adults and the 1995 National Nutrition Survey of Australia, for children. The NEDI calculation is made in accordance with Guidelines for predicting dietary intake of pesticide residues (revised) [World Health Organization, 1997].

The NEDI for mandipropamid is equivalent to 0.02% of the PDE_(food). It is therefore concluded that the chronic dietary exposure is small and the risk is acceptable.

Toxicological / Public Health Assessment

It has been determined that the use of mandipropamid as a fungicide for use on onions, according to the GAP specified above, is very unlikely to pose any health risks from consumption of the harvested commodity.

Other International MRLs

To meet New Zealand’s obligations under the Agreement on the Application of Sanitary and Phytosanitary Measures the proposed MRL will be notified to the World Trade Organization. Any country may choose to comment if they believe the proposed MRL represents a barrier to their trade.