Bioresmethrin is a synthetic pyrethroid insecticide formerly used as a grain protectant but now only registered in Australia for use in the home and garden as an insecticide.

Bioresmethrin Review

In 2001 the APVMA (formerly the NRA) began the review of bioresmethrin because of concerns over residues in beef and thus the potential risk to Australia’s international beef trade. The key issue was that appropriate Maximum Residue Limits (MRLs) for food-producing animals (commodities) had not been set and thus feeding bioresmethrin treated grain was not supported. Temporary MRLs were established by the APVMA for the duration of the review.

The registrants of grain protectants containing bioresmethrin voluntarily withdrew the registrations of their products before completion of the review.

Because the registrations for bioresmethrin grain protectants had been withdrawn, the APVMA did not continue with the review. The APVMA withdrew the temporary MRLs for food-producing animals in 2003.

The remaining bioresmethrin insecticides are not registered or labeled for use on animals or in animal housing situations. Thus it is unlikely that these products will cause residue violations in livestock and prejudice Australia’s export trade.

APVMA Bioresmethrin Archive

Title Date
Gazette Notice: suspension of BRM grain protectant Dec 2001
Gazette Notice: review and suspension of selected bioresmethrin products Aug 2001

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