Mole Bean Plant Toxic?

Updated 2026-03-06| 2 min read| 1,572 found this helpful

Contains ricin, one of the strongest known natural toxins, classified as a potential biological weapon

Ingestion of as little as 1 ounce of chewed seeds can be fatal, with symptoms developing 12 to 48 hours after exposure

All common domestic animals (cats, dogs, horses, livestock) are susceptible to poisoning from this plant

FAQ

Is Mole Bean Plant toxic to Humans?

Nausea, vomiting, bloody diarrhea, abdominal pain, difficulty breathing, organ failure, seizures, coma, potentially fatal if untreated (Severe)

Is Mole Bean Plant toxic to Cats?

Loss of appetite, excessive thirst, weakness, difficulty breathing, bloody diarrhea, convulsions, increased risk of death (Severe)

Is Mole Bean Plant toxic to Dogs?

Hemorrhagic gastroenteritis, colic, weakness, convulsions, coma, multi-organ failure, circulatory collapse (Severe)

Is Mole Bean Plant toxic to Horses?

Sweating, difficulty breathing, ataxia, hyperthermia, rapid heart rate, muscle twitches, colic, progressive central nervous system depression (Severe)

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Toxicity Details

Humans

Severe

Nausea, vomiting, bloody diarrhea, abdominal pain, difficulty breathing, organ failure, seizures, coma, potentially fatal if untreated

Cats

Severe

Loss of appetite, excessive thirst, weakness, difficulty breathing, bloody diarrhea, convulsions, increased risk of death

Dogs

Severe

Hemorrhagic gastroenteritis, colic, weakness, convulsions, coma, multi-organ failure, circulatory collapse

Horses

Severe

Sweating, difficulty breathing, ataxia, hyperthermia, rapid heart rate, muscle twitches, colic, progressive central nervous system depression

Toxicity Snapshot

Toxic PartsSeeds (only cause poisoning if chewed), leaves

Exposure RoutePrimary exposure is ingestion of chewed seeds or plant foliage; no dermal toxicity from casual contact is reported

Toxic CompoundsRicin (heat-sensitive, fat-insoluble toxalbumin, not present in processed castor oil)

First Aid & Prevention

First 30 Minutes

• Induce vomiting only if ingestion occurred within 2 hours and the exposed person/animal is fully conscious
• Remove all remaining plant material from the mouth and surrounding area to prevent further exposure
• Do not administer food, drink, or activated charcoal unless explicitly advised by a medical professional or veterinarian

Contact Vet Immediately

• Any confirmed or suspected ingestion of Mole Bean Plant seeds or foliage
• Appearance of associated symptoms including weakness, bloody diarrhea, breathing difficulty, or convulsions
• If you find your pet/horse chewing on any part of the plant, even if no symptoms are present yet

Prevention

• Remove Mole Bean Plants from areas accessible to children, pets, and livestock
• Securely dispose of pruned foliage and seeds to avoid accidental ingestion
• Only use heat-treated castor bean extraction meal as fertilizer, as unheated meal retains toxic ricin

Treatment & Prognosis

• Gastrointestinal decontamination (emesis, activated charcoal, gastric lavage) for recent ingestion cases
• Symptomatic supportive care including fluid therapy, pain management, and anti-seizure medication as needed
• Long-term monitoring of liver, kidney, and cardiovascular function post-exposure

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Professional Toxicology

Scientific NameRicinus communis

AliasesCastor Bean Plant、Palma Christi、Castor Oil Plant

Toxicity Grade

HumansSevere

CatsSevere

DogsSevere

HorsesSevere

Target Organs

Gastrointestinal tractCentral nervous systemCardiovascular systemLiverKidneys

Mechanism of Action

• Ricin inhibits cellular protein synthesis, causing widespread cell death and multi-organ damage

• Toxicity onset is delayed 12 to 48 hours after ingestion as the toxin accumulates in body tissues

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Cattle: Bloody diarrhea, weakness, hypothermia, tachycardia, heart arrhythmias, dyspnea, reduced milk production, abortion

Neonatal calves: Weakness, weak pulse, difficulty breathing, diarrhea, swollen joints, high mortality rate

Pigs: Vomiting, diarrhea, weakness, incoordination, convulsions

Goats: Colic, diarrhea; unheated castor bean extraction meal fertilizer is a common source of poisoning for cattle and dogs

Confusion Risk

The following plants look similar and may be confused:

Castor Bean Tick Ixodes ricinus

Mole Bean Plant seeds closely resemble mature female castor bean ticks; seeds are hard, plant-derived, while fully grown ticks are arthropods with 8 visible legs

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Related Toxic Plants

Poinsettia

Euphorbia pulcherrima

Low (mild skin and gastrointestinal irritant)

Crown of Thorns

Euphorbia milii

Moderate (causes skin blistering, gastrointestinal distress, and eye damage)

Manchineel

Hippomane mancinella

Severe (extremely toxic, skin contact causes blistering, ingestion is often fatal)

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Data Sources

1. ASPCA Animal Poison Control

2. CliniTox (Universität Zürich)

This information is for reference only and does not constitute medical advice. If ingestion or poisoning is suspected, seek medical or veterinary attention immediately.