All this spring I would walk around my yard with a spritz bottle of spectricide and sprayed literally hundreds of these things as they hatched out and gathered in my day lilies and other flowers.
Thought I had done a fair job of eradicating the creatures. Guess what! when it is cool and damp in the early morning now, I can walk around and harvest(!) them.
Just look for leaves that look as if rabbits have half eaten them on elephant ears, iris, hibiscus, you see what look like rat droppings all over and around the plant and there they are!!!
I refuse to indiscriminately spray plants cause I don't want to harm other thing living in the beds; have resorted to gleefully cutting or pulling the heads of these monsters and leave them lying around for their fellow lubbers to see!!! This is war, suffer suckers!!