Tansy Ragwort (a.k.a Tansy Ragweed) is one of many invasive species that can be found in our state that you might find in and around your gardens. Asked July 3, 2014, 3:47 PM EDT. Practice good pasture management; avoid overgrazing, irrigate and fertilize as needed, and reseed bare ground. Mowing can be used as an interim measure to keep it from blooming and going to seed, but other control methods will be needed the same year before flowers form. 4.Utilize cinnabar larvae, tansy ragwort flea beetle, or ragwort seed fly as effective biological control. Tansy ragwort is an invasive, toxic biennial weed from Europe often found in pastures and along roadsides. Tansy ragwort has long tormented hay producers and rural landowners who graze livestock. The Tansy Games are a contest to encourage all interested able-bodied people to gather and dispose of Tansy Ragwort at the Del Norte County Transfer station during the contest period. It can be differentiated from tansy ragwort by the differences in its leaves and seedhead. Flowerheads are in somewhat flat-topped clusters. It is very toxic and can be deadly if there is enough exposure. This means there is less pasture for his livestock to graze on. It makes horses sick and can kill them if they eat enough of it. Monitor pastures, areas used by livestock, horse trails and roadsides for new populations of tansy ragwort in June and July. Residents will be able to dispose of only one 32-gallon bag of tansy ragwort for free. Tansy Ragwort (a.k.a Tansy Ragweed) is one of many invasive species that can be found in our state that you might find in and around your gardens. “But this is worth the cost [compared to the] financial cost of losing an animal,” he said. It is the time of year when roadsides and pastures glow with golden flowers on long stalks. (cutting it or mowing will make your problem worse and release seeds) Tansy Ragwort is an invasive plant that can take over a farmer’s fields. It can be referred to as benweed in Ireland and as tansy ragwort, or tansyweed in parts of the USA, although its resemblance to the true tansy is superficial. But due to the rapid spread this year, a recent press release announced they’re having to curtail the program. Tansy Ragwort leaves are dark green, without stalks, and are deeply cut and ragged- looking; its small yellow ray flowers are clustered at the tops of the stems. It is believed to have been introduced here in the early 1900s through ballast water from a ship. • Tap-rooted biennial or short-lived perennial with 2 to 4 foot tall erect stems, branched near the top, with clusters of bright yellow daisy-like flower heads. Plants can easily be pulled-up, roots and all, by grabbing near the bottom of the stem and pulling up. If you have a lot of tansy plants and are feeling overwhelmed, focus first on areas where grazing animals are present or along fence lines to help with your neighborly relations. Plants are easiest to pull after plants have bolted but before flowering (elongation of flowering stem has started), and when the soil is moist. Be careful not to confuse tansy with tansy ragwort (Senecio species) and other plants generically referred to as "tansy." Herbicides can be used on large areas, as well, with care to follow instructions on application. Tansy ragwort is a Class B weed selected for control in some areas of the County. The leaves of tansy ragwort are usually dark green and deeply veined. What is the law relating to Ragwort? The plant remains toxic when dried in hay. The Tansy Games are a contest to encourage all interested able-bodied people to gather and dispose of Tansy Ragwort at the Del Norte County Transfer station during the contest period. 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