Thistle Flower Or Weed. Conicus is established in the western United States and targets various thistle species. They are mostly native to.
Sometimes the word thistle is used to refer only to specific genera Cirsium Carduus and Onopordum. There are over 200 types of thistle flowers however some are viewed less gloriously than the common thistle found in Scotland. Conicus is established in the western United States and targets various thistle species.
The Thistle Head Weevil Rhinocyllus conicus is a biological control agent effective for managing the growth of this weed.
Thistles are among the weeds that are mostly reviled but are readily identifiable. Although thistle is technically a herbacious plant of the daisy family its also classified as a Noxious Weed in many states meaning its harmful enough to warrant government-regulated control. If your thistles are in a curated garden opt for a selective weed killer. There are over 200 types of thistle flowers however some are viewed less gloriously than the common thistle found in Scotland.