What type of rodenticides affect blood clotting and can be effective after one feeding?

Single feeding anticoagulant rodenticides are designed to disrupt the blood clotting process in rodents after just one interaction with the bait. These substances, which include compounds like brodifacoum and difenacoum, work by inhibiting vitamin K recycling in the rodent's body, leading to potentially fatal hemorrhaging.

The effectiveness of single feeding anticoagulant rodenticides after a single meal makes them particularly valuable in pest control, as it reduces the amount of bait needed and limits the risk of squirrels or other non-target species consuming multiple doses. The rapid action can be advantageous in situations where rodent populations need to be controlled quickly.

While multi-feeding anticoagulant rodenticides require multiple feedings over several days to achieve a lethal dose, this is not the case for single feeding types, which is a key distinguishing feature. Non-anticoagulant rodenticides operate through different mechanisms and do not impact blood clotting. Lastly, trapping rodenticides do not include chemical baits, as they rely on physical traps to capture rodents rather than inducing poisoning.