Widely distributed but controllable. High priority for control or eradication where possible.
Quick Facts
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Report on EDDMapSBlack Henbane
Hyoscyamus niger
Overview
Black henbane is a highly toxic annual or biennial plant from Eurasia. All parts of the plant are poisonous to humans and livestock, containing tropane alkaloids. It has a distinctive unpleasant odor. Even small amounts can be fatal to children.
How to Identify
Annual or biennial 1-3 feet tall. Sticky, hairy, unpleasant-smelling leaves. Distinctive cream-colored flowers with purple veins and a purple center. Seed pods are enclosed in a spiny calyx.
Control Methods
Wear gloves when handling - all parts are toxic. Hand-pull or dig before seed set. Herbicide treatment for larger infestations.
Herbicide Recommendations
2,4-D or dicamba applied in early growth stages. Dispose of plant material carefully.
⚠️ 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.
