which plant component is the most powerful poison? what is it's LD50? are there any ancient uses for it?
Here's a pair to start with:
http://en.wikipedia.org/wiki/Abrin
http://en.wikipedia.org/wiki/Ricin
There are several poisonous plants which cause acute symptoms or death of fish, birds, animals and human beings. There are many books and articles on the subject. Plant poisons have played havoc since antiquity and have the dubious distinction of causing death of important persons to ordinary citizens. In Indian villages people with suicidal tendencies eat Nerium fruits or fruit extract. Calotropis, Datura are commonly found poisonous plants in Indian villages. A list of important poisonous plants is given in the following link:
http://en.wikipedia.org/wiki/List_of_poisonous_plants
Here is another link to poisonous plants:
http://www.ivydenegardens.co.uk/Plants/poisonousplantsl.html
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