Common Ragwort
Senecio jacobaea
Horse
Severe
Remove access and monitor the horse; call at the first sign.
Equio informs, it does not diagnose. When in doubt, call your vet.
What to do now
- Antidote
- There is no specific antidote. Treatment is symptomatic and supportive, aiming to support liver function and remove the source.
- Time to signs
- Can range from a few weeks to several months due to the cumulative nature of the toxicity.
- Prognosis
- Poor to guarded, especially if liver damage is significant. Recovery is rare once clinical signs appear.
- Immediately remove the horse from the contaminated area.
- Contact an emergency veterinarian.
- Do not induce vomiting.
- Provide fresh water.
- Closely monitor for clinical signs.
Its ID card
- Height
- 30-150 cm
- Flowering
- June to October
- Toxic parts
- All parts of the plant, fresh or dried.
- Toxin
- Pyrrolizidine alkaloids (PAs)
- Habitat
- Pastures, meadows, roadsides, waste ground, disturbed land, sand dunes.
- Soil indicator
- Prefers well-drained soils, often poor and acidic, but adapts to a wide range of soils.
- Regions
- Europe, North Africa, North America, New Zealand, Australia
- In hay
- Yes — stays toxic once dried
- Palatability
- Generally unpalatable when fresh, but becomes more palatable when dried in hay or silage.
When the risk rises
All seasons, but the risk is highest during the flowering period (summer) and when the plant is present in hay.
Spotting it in the field
Other Senecio species (e.g, Senecio vulgaris), but the size and shape of the leaves and flower heads are distinctive. Can be confused with similar-looking non-toxic plants. — smell : slightly aromatic, but not particularly strong.
- Herbaceous plant with an erect stem.
- Basal leaves are lobed, deeply cut, resembling dandelion leaves.
- Stem leaves are smaller and less lobed.
- Bright yellow flower heads, resembling daisies, clustered in dense corymbs.
- Flowering period from June to October.
Signs to watch for
Primarily chronic due to toxin accumulation, but acute ingestion of large amounts can occur.
Dose : Difficult to determine precisely due to the cumulative nature and variability in toxin concentration.
- Lethargy
- Loss of appetite
- Weight loss
- Jaundice (icterus)
- Increased thirst and urination
- Neurological signs (disorientation, ataxia, "weaving" movements, blindness)
- Colic
- Diarrhea
Who is affected
Other species : Other plants containing pyrrolizidine alkaloids can cause similar symptoms (e.g, Comfrey, Borage).
In pregnant mares : pyrrolizidine alkaloids can be teratogenic and cause abortions or birth defects in fetuses.
Getting rid of it
Method : Manual control, mechanical (pulling), chemical (selective or non-selective herbicides), biological (use of specific predatory insects).
- Identify and remove the plant from pastures.
- Regularly monitor grazing areas.
- Avoid mowing the plant and leaving it in hay.
- Educate animal owners about the dangers of ragwort.
- Ensure adequate nutrition to reduce the likelihood of ingesting toxic plants.
Frequently asked questions
Can Equio identify Common Ragwort from a photo?
It can help organize visual clues, but plant identification must remain cautious when horse health is at stake.
Is Common Ragwort dangerous in hay?
This entry flags hay vigilance. Isolate suspicious forage and ask for professional advice if exposure is possible.
This page is informational. If ingestion is likely, if signs appear, or if the horse is fragile, contact a veterinarian immediately.