Which rodenticide is ordinarily a single-dose toxicant?

Bromethalin is recognized as an effective rodenticide that operates as a single-dose toxicant. This means that a rodent can be killed after ingesting a lethal dose in just one occasion, which is a significant advantage over other rodenticides that require multiple feedings to achieve a lethal effect.

Bromethalin works by affecting the central nervous system of rodents, leading to rapid neurological symptoms and eventual death. It disrupts the energy production in cells, which is crucial for various bodily functions, making it a fast-acting option compared to anticoagulants.

In contrast, the other rodenticides mentioned are anticoagulants. Warfarin and diphacinone require multiple doses over a series of days for the rodent to accumulate enough of the toxicant in their system to cause death. Chlorphacinone also operates in the same manner as a multiple-dose anticoagulant, necessitating the rodent to consume the bait over a period before being affected lethally.

Thus, bromethalin’s single-dose mechanism and immediate effect distinguish it as a unique and effective choice for rodent control in situations where rapid action is desired.