no idea, we grew some sunflowers, but I odn't remember a problem, that looks like some type of...worm maybe? I'm curious. when I started this little fun forum, I was hoping that occasionally...someone really knowledgable about veggies would step up. My knwoledge is pretty much, reading, discussion/good advice turned into trial and error, and I read Growing edge mag and maximum yield...check out their sites for some piks of sunflower problems...Hell google sunflowers. LOL peace Hang in there. I know it can be discouraging on occasion.