I'm pretty sure I've got a hornworm munching on one of my tomato plants. All the leaves have been eaten leaving empty stems. Another sign I saw were little green deposits on the ground and on some leaves that look remarkably like corn on the cob, but about the size of a pencil eraser. I looked for it throughout the plant, but to no avail. Where do they go during the daytime? Do they only munch during the evening hours? Larry Joliet, IL Zone 5