caterpillar/cutworm poop

I've discovered some caterpillars in the plants in my backyard (might be cutworms I dunno, I'm not a doctor) and they are a bitch to find, they blend in real well. I sprayed this stuff made by Sevin that's used for edible plants so I figured it would be fine as long as you wait 7 days for harvest after application like it says on the bottle. Upon closer examination I've discovered these little pellet like things in the interior of the plant. I'm wondering what it might be, my best guess was poop from the caterpillars. Am I correct or does anyone have any better idea?


 
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