Hydramethylnon, the active ingredient in Amdro, functions as what type of poison?

• A. Systemic Poison
• B. Contact Poison
• C. Stomach Poison
• D. Inhalation Poison

Answer: (C)

The key idea here is how the toxin works in the insect. Hydramethylnon in Amdro is designed as a bait that ants must eat to be affected. It acts inside the gut after ingestion, so it’s a stomach poison. Because it is slow-acting, the ants that eat the bait bring it back to the nest and share it, eventually killing workers and the colony as the toxin passes through the feeding chain. It doesn’t kill through contact with the insect’s body, nor does it rely on inhalation or movement through the insect’s tissues in a systemic way. So the best classification is a stomach poison.