[Hygienic evaluation of Euparen fungicide residues in food products].

Euparene (N1,N1-dimethyl-N-phenyl-fluorine-dichlormethylthiosulfamide) is a highly effective fungicide used in controlling a number of fungus infections affecting grapes and strawberries. Following chemical treatment it is found on these agricultural crops both as a starting product and in the form of its metabolite (N1,N-dimethyl-N-phenyl diamide sulfide), whose residual quantities exceed, at times, those of the original compound itself. The organoleptic properties of grapes change with the content of the above substances of not less than 10 mg/kg. Euparene belongs to the category of compounds with little and medium-toxic and moderately pronounced cumulative properties (LD50 for rats -- 4630 mg/kg, for mice -- 1905 mg/kg, for guinea pigs -- 805 mg/kg. Cummulation coefficient with introduction of 1/20 LD50: for mice -- 3.7, for guinea pigs -- 3.3). In a chronic 10-month long experiment the threshold dose of the preparation was set at a level of 5.4 mg/kg, and subliminal -- at 1.6 mg/kg. The metabolite proved to be somewhat more toxic, but less cumulative than euparene (LD50 for mice -- 820 mg/kg, cumulation coefficient -- over 5). The permissible residual concentration (PRC) of euparene and its metabolite in grapes is recommended at a level of 1.3 mg/kg (total), while in strawberries it is not permitted at all. In the case of grapes the "expectation time" should be 30 days with the consumption of the preparation of up to 3 kg per hectar and in that of strawberries -- 15 days and its consumption of up to 1.2 kg/he.