is a single feed rodenticide. Single feed means a rodent can consume a lethal dose of Bromadiolone in 1 feeding therefore resulting in death within 1-5 days. The number of rodents that 1 block will treat is undeterminable. Place 3 to 16 Contrac Blox
(usually at intervals of 15 to 30 feet) per placement. Maintain an uninterrupted supply of fresh bait for at least 10 days or until signs of rat activity cease. Replace contaminated or spoiled bait immediately. Collect and dispose of all dead animals and leftover bait properly. To prevent reinfestation, limit sources of rodent food, water, and harborage as much as possible. If reinfestation does occur, repeat treatment. Where a continuous source of infestation is present, establish permanent bait stations and replenish as needed.