 "Acharia stimulea" is known for having one of the strongest stings and due to the saddleback caterpillar being commonly found in ornamental plants, gardeners are most at risk to accidental exposure.The spines along the caterpillar, when broken, will release an irritating toxin into its victims that is known to cause acute urticaria in humans.These spines are fragile and can become airborne and embedded into surfaces therefore immediate action is required for removal if infected to prevent prolonged harm.