ricin
While the answer is debatable, the castor plant is high on the list. One castor bean can kill a person. The toxin ricin is derived from castor beans.
Ricin
Ricin is a proteinic cytotoxin derived from the common castor bean, Ricinis communis. Recovered from the meal of castor beans in the castor oil making process, ricin toxin is perhaps 1,000 fold less toxin that botulinum toxin. Ricin is most toxic if inhaled and least toxic if swallowed. It has the potential to be used as a chemical warfare agent.
ricin
Castor bean is not poison to deer unless the group of deer of your reagion has alergy to it , it is common cows or goats invade castor plantation and just be all right that happen because the toxin is iion the seed and the deer is going to eat the leaves
you can avoid plant toxin mainly by looking at the underside of the leaf. if it has streaks of purple, it usually means it's toxic. to avoid toxins that are absorbed into the plant from the environment, simply hold it under your nose. if it smells tangy, its toxic.
Cell Wall
the nicotine toxin is specified to onyl hurt plant eating animals who consume it.
Waiting to find out if a big contract comes through.
It is a biomicrobial toxin.
No, it is not a toxin.