Will I be able to take care of the issue by vigilantly hunting these creatures (which manages my snail problem fairly well), or do I need chemicals, mantises, Wile E. Coyote style traps, etc.?
Most of the damage is confined to the flower part of the plant. A few leaves have a few bites taken out, but they dont seem interested in eating the green part. They tend to hide in the.... shaft?-of the flower. They are visually similar to the worms in this question. Size is roughly .5cm to 1cm. The plants are planted in the ground, not a hanging basket. Located in New Mexico, USA. This question doesn't really help. Some Photos: