DITRAC Tracking Powder contains a toxicant mixed with special carries that adhere to the rodents fur and paws. It is ingested when the rodent grooms. Tracking powder is insoluble in water which prolongs the effect of the powder, making it ideal for tough jobs. Tracking powder is good to use under controlled conditions when bait acceptance is poor. Apply in bait stations, rodent runways, burrows, wall voids or other areas where rodents travel.