October 5, 2022 Also Devilish The Milkweed bug (Oncopeltus fasciatus) is actually fairly harmless. A piercing, sucking insect, it doesn’t do major damage to milkweed plants. Folks who view milkweed as a weed consider this insect to be beneficial. Share this: Click to email a link to a friend (Opens in new window) Email Click to share on Facebook (Opens in new window) Facebook Click to share on LinkedIn (Opens in new window) LinkedIn Like Loading... Related