Limited distribution in Utah. High priority to eradicate all known populations and prevent new ones.
Quick Facts
Report your sighting through EDDMapS to help us track and respond to new infestations.
Report on EDDMapSBlueweed (Viper's Bugloss)
Echium vulgare
Overview
Viper's bugloss is a biennial or short-lived perennial from Europe that invades roadsides, rangelands, and disturbed areas. It contains pyrrolizidine alkaloids that are toxic to livestock, especially horses. Dense infestations can significantly reduce forage quality.
How to Identify
Bristly biennial 1-3 feet tall. Striking blue-purple funnel-shaped flowers with protruding red stamens. Leaves are lance-shaped and covered in stiff bristly hairs. Stems are spotted with red at the base of each bristle.
Control Methods
Hand-pull or dig rosettes before flowering. Mowing before seed set. Herbicide treatment on rosettes in fall or spring.
Herbicide Recommendations
2,4-D, picloram, or metsulfuron applied to rosettes. Fall treatment of first-year rosettes is most effective.
⚠️ Always read and follow pesticide label directions. Contact your county weed superintendent for site-specific recommendations. Permits may be required near water.
Need help managing this weed?
Skyline CWMA can connect you with technical assistance, cost-share programs, and licensed contractors for treatment on your property.
