The act of intentionally causing the death of a possum through the administration of a toxic substance constitutes poisoning. This involves utilizing chemical compounds or other harmful agents specifically designed to induce mortality in the animal. An example would be the deliberate placement of poisoned bait in an area frequented by possums.
The practice of using toxins to eliminate possums is sometimes undertaken to mitigate perceived damages to gardens, agricultural crops, or property. Historically, such methods have been employed in areas where possums are viewed as pests, particularly where they compete with humans for resources or pose a threat to native species. However, the effectiveness of lethal control is often debated, with concerns raised about non-target species and ecological consequences.