[Studies of the Pedix Pe 50 excretion dynamics in milk]

Reported in this paper are studies which had been conducted in to excretion through the milk of butonate, trichlorophone, DDVP, and vinylbutonate, following Pedix PE 50 treatment of lactating cattle. Pedix PE 50 with butonate as its active principle, is going to be used on lactating cattle for the control of parasites, after it had been applied with good success to other animal species. The amounts of organophosphorus insecticide detectable in the above experiments and related to one kilogram of milk were 0.079 mg in the first milked portion, 0.03 mg in the second, and 0.02 mg in the third. Hence, control of the first two milked portions appears to meet all demands emanating in terms of food hygiene, toxicology, and economy, provided that in applying Pedix PE 50 to lactating cattle due consideration is given to the concentration specified in the manufacturers' instructions for use as well as to the necessary time interval between treatment and first milking.