Which is NOT classified as an Acute Rodenticide?

The classification of rodenticides into acute and chronic types is based on their mechanism of action and the speed at which they affect rodent populations. Acute rodenticides are designed to kill pests quickly, usually after a single dose, while chronic rodenticides require multiple feedings over time to achieve their lethal effects.

Warfarin is a well-known anticoagulant, which means it works by inhibiting the blood clotting process in rodents. Because of its mechanism, it is classified as a chronic rodenticide, as it often takes several days of exposure to significantly reduce the rodent population. The lethality associated with Warfarin is not immediate; rodents must consume a significant quantity over time before it has a fatal effect.

In contrast, substances like Zinc Phosphide, Bromethalin, and Cholecalciferol act rapidly to kill rodents. Zinc Phosphide releases phosphine gas when ingested, leading to quick poisoning. Bromethalin disrupts the neurocircuitry of rodents, resulting in rapid neurological failure. Cholecalciferol causes calcium toxicity, which can lead to death in a relatively short timespan after consumption.

Therefore, Warfarin stands out as the substance that does not fit the acute classification,