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It is very toxic and sheep, cattle, swine, horses, and other domestic animals are poisoned by eating small amounts of green or dried plant. It is also extremely poisonous to humans. Poison-hemlock is sometimes confused with western water hemlock, a more deadly species, because the names are similar.
The toxicity of the plant varies depending on the stage of growth, environmental conditions (rain, temperature, cloud cover), and soil. Although all parts of the plant are toxic, the most toxic parts are full formed fruit that is still green, ripe fruits, and stems.
13 lis 2020 · Poisoning caused by hemlock water dropwort is sporadically identified in livestock at pasture; diagnoses have been recorded between April and November. The toxic effects of the plant have been recognised for many years, with human poisoning cases recorded historically (Socrates reportedly poisoned himself in 399 BC).
15 maj 2019 · Prevent water hemlock poisoning in livestock by carefully surveying pastures and ranges at a time when the plant can be identified, and eradicate it. The plants, which usually grow in small patches, are easy to locate.
13 mar 2024 · Cattle seldom choose to eat poison hemlock unless no other forage is available or it is incorporated in hay, silage, or the seeds in grain. A commonly asked question is how much plant material must be consumed by cattle to kill them.
Cause: ingestion of hemlock (Conium maculatum). Signs: gastrointestinal and neurological signs, abortion and teratogenic effects (chronic ingestion). Diagnosis: based on history of exposure and evidence of plants grazed. Treatment: supportive. Prognosis: poor in animals with pronounced signs.
1 wrz 1988 · Poison-hemlock also causes skeletal defects in the offspring of cattle, pigs and sheep and cleft palate in pigs when ingested during specific periods of gestation. The primary toxicants in poison-hemlock are coniine and γ-coniceine.
