Migration of chlorothalonil and carbendazim in fruits stored in wood treated with the anti-sapstain formulation Tuff Brite C

IRG/WP 97-50097

J F Cooper, D Riboul, M De Vleeschauwer, T L Woods

Fruits and vegetables stored in treated wood boxes are in contact with the products used for the treatment. In order to obtain regulatory approval for incidental food contact it is necessary to determine the quantity of residues on these fruits or vegetables. When the active materials are used in agriculture it is required that residues found are below to the MRL fixed for these substances. In the case of Chlorothalonil this MRL (in Spain) is 0.5 mg/kg for apples (at European level a MRL of 1 mg/kg has been requested). For food contact approval of antisapstains it is therefore required that residue of Chlorothalonil transferred from treated wood is below this limit. Tuff Brite C is an antisapstain formulation of ISK Biosciences containing 450 gr/litre of CTL and 100 gr/litre of Carbendazim. A first migration study was conducted by the University of Gembloux in Belgium on wood treated with 1% Tuff Brite C. No residue was founded on: Apples after 55 days, Cherries after 7 days, Cucumbers after 7 days, Tomatoes after 7 days. This study was limited by the length of time the fruit could be held for observation. Therefore a second migration study was conducted by the University of Montpellier; France.


Conference: 97-05-25/30 Whistler, British Columbia, Canada

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