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Proposals to Amend the New Zealand (Maximum Residue Limits of Agricultural Compounds) Food Standards 2007

5 Proposal to set an MRL for Myclobutanil

It is proposed that an MRL is set for myclobutanil when used as a fungicide for pomefruit. It is proposed that Schedule One of the NZ (MRL) Food Standards 2007 be amended to include:

The final entry for myclobutanil in Schedule One of the NZ (MRL) Food Standards 2007 will therefore read:

Amendment Rationale

The proposed MRL represents a new use pattern in New Zealand for the active ingredient myclobutanil. The proposed MRL will manage the new use of myclobutanil as a fungicide for pome fruits to the application rates and withholding periods that are approved as good agricultural practice (GAP) (see below) in New Zealand.

Chemical Information

Good Agricultural Practice

Myclobutanil is used as a fungicide for pome fruit. Application may be up to 4 times at 7 day intervals from pink through to second cover, at 4.8gai/100L with a withholding period of 35 days.

Residues Information

Residue data for pome fruit support an MRL of 0.1mg/kg at 35 days after the last treatment. An MRL of 0.1mg/kg is therefore proposed to support GAP.

Dietary Risk Assessment

The potential daily exposure via food (PDE_(food)) is used for dietary intake calculation where a value has been set. An appropriate acceptable daily intake (ADI) is used in the absence of a PDE_(food).

The chronic dietary exposure to myclobutanil 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 Organisation, 1997].

The NEDI for myclobutanil is equivalent to 0.5% of the ADI. 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 myclobutanil as a fungicide for use on pome fruit, according to the GAP specified above, is very unlikely to pose any health risks from consumption of the harvested commodity.

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.