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Ragwort is of concern to people who keep horses and cattle. [23] [24] In areas of the world where ragwort is a native plant, such as Britain and continental Europe, documented cases of proven poisoning are rare. [25] Horses do not normally eat fresh ragwort due to its taste.
Plants can cause reactions ranging from laminitis (found in horses bedded on shavings from black walnut trees), anemia, kidney disease and kidney failure (from eating the wilted leaves of red maples), to cyanide poisoning (from the ingestion of plant matter from members of the genus Prunus) and other symptoms.
Horses seem to be particularly vulnerable to senecionine poisoning through ingestion of ragwort. Symptoms of poisoning in horses (known as "horse staggers") include nervousness, yawning, fatigue, and unsteady gait. [17] Some species have evolved to leverage senecionine for their own benefit.
Horses do not normally eat fresh ragwort due to its bitter taste, however it loses this taste when dried, and becomes dangerous in hay. The result, if sufficient quantity is consumed, can be irreversible cirrhosis of the liver. Signs that a horse has been poisoned include yellow mucous membranes, depression, and lack of coordination.
Senecio madagascariensis contains pyrrolizidine alkaloids and is poisonous. [10] Horses, cattle, and other livestock are at risk. Symptoms of poisoning from fireweed include gradual weight loss, jaundice, fluid in the lungs, blindness, sudden death without any other indications, aimless wandering, muscular coordination, twitching of the head muscles, abdominal straining, rectal prolapse, and ...
The horse was under vet care in both incidents, but the cause was not definately confirmed. After the 2003 Canberra bushfires over 40 recorded horses were put down after eating Patersons Curse. [1] Heavy snowfalls can also lead livestock to consume taller plants such as bracken.Cgoodwin 01:45, 15 December 2010 (UTC)
The ragwort flea beetle and ragwort seed fly have been approved and released for Senecio control in California, [19] Australia [37] and elsewhere. Fungi Most Senecio , including S. squalidus are susceptible to rust and other fungus and mildews : [ 6 ] [ 38 ] [ 39 ]
Pyrrolizidine alkaloidosis poisoning in the United States has remained moderately rare among humans. The most common reports are the outcome of the misuse of medicinal home remedies, or the alkaloids are present in food and drink substances such as milk and honey when the animal carriers were exposed to the toxins.