Widely distributed but controllable. High priority for control or eradication where possible.
Quick Facts
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Report on EDDMapSYellow Toadflax
Linaria vulgaris
Overview
Yellow toadflax (butter-and-eggs) is a perennial plant from Eurasia that invades rangelands, roadsides, and disturbed areas. It contains a glucoside chemical that is poisonous to livestock if eaten in large quantities. Its extensive root system makes it difficult to control.
How to Identify
Perennial 1-3 feet tall. Distinctive snapdragon-like yellow and orange flowers. Narrow, linear leaves. Spreads aggressively by both seeds and creeping roots.
Control Methods
Biological control using a weevil (Mecinus janthinus) is effective. Herbicide treatment for new infestations. Repeated treatments are necessary due to root regeneration.
Herbicide Recommendations
Picloram, clopyralid, or imazapic. Biological control (Mecinus weevil) is recommended for established infestations.
⚠️ 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.
