What is this yellow/black bug on my sunflowers? Home › Forums › Flower-Garden Questions › Annuals and Perennials › What is this yellow/black bug on my sunflowers? This topic contains 0 replies, has 1 voice, and was last updated by Anonymous 8 years, 9 months ago. Viewing 1 post (of 1 total) Author Posts August 27, 2008 at 7:33 pm #28390 Anonymous Can you attach the jpg from Flickr or one of your own or the link to the Flickr gallery so I cna see? Thanks. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic.