Preposition: of

• rye: The remarkable effect of the ergot of rye in restraining these losses lends color to the idea.

Modifies a noun

• alkaloid: Ergot alkaloids The ergot alkaloids have been used to treat migraine attacks for over 50 years.

• poisoning: Until quite recently, outbreaks of ergot poisoning approaching epidemic proportions were recorded in most European countries including certain areas of Russia.

• fungus: Finally, another molecule, derived from the ergot fungus, methysergide ( Alliance ), has some use in migraine prevention.

• derivative: The mechanism of action of the ergot derivatives is probably related to their 5-HT agonist effects.

• contamination: Should ergot contamination of the crop occur the crop would be valueless.

Noun used with modifier

• rye: One of the earliest uses of biological weapons occurred in the 6th century BC when the Assyrians poisoned enemy wells with rye ergot.

• fungus: Another lupine connection is the fungus ergot, which is particularly associated with rye.