Jimsonweed has long been known to be toxic all classes of livestock and to humans as well. Horses rarely consume Jimsonweed if other forage is available because of its foul odor and taste.
All parts of the Jimsonweed plant are poisonous in which toxicity is caused by tropane alkaloids. Symptoms of poisoning in horses may occur within minutes to several hours and may include: seeking water to drink, dilated pupils, agitation, increased heart rate, trembling, convulsions, coma and possibly death. Methods for controlling Jimsonweed can range from mechanical to chemical. It is important to remember that if you choose to use a herbicide for control method, be sure to carefully read the label for grazing restrictions that may apply.
Toxic plants of concern in pastures and hay for Michigan horses. MSU Weed Science. This article was published by Michigan State University Extension. Side effects from ingesting jimson weed include tachycardia, dry mouth, dilated pupils, blurred vision, hallucinations, confusion, combative behavior, and difficulty urinating.
Severe toxicity has been associated with coma and seizures, although death is rare. Treatment consists of activated charcoal and gastric lavage. Esmolol or other beta-blocker may be indicated to reduce severe sinus tachycardia. All parts of the Jimsonweed plant are toxic to livestock and people.
To help manage the spread of this invasive weed, please be on the lookout for this plant. To monitor and control the spread of this weed, please contact Transportation and Agriculture Services Department at if you find it on your property. If you find Jimsonweed in your field, you should remove it immediately and follow these steps:.
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