The AHDB (Agriculture and Horticulture Development Board) says: All cereals are susceptible. In order of decreasing susceptibility: rye, triticale, wheat, barley, oats. Ergot is also relatively common in wild grasses throughout the UK.
[member=26320]doganjo[/member] Ergot was the cause of the Salem witch trials apparently although QI would probably give me bells and clangers for that. It's a fungus which is found on grasses but more importantly to humans on cultivated cereal crops. When eaten it can cause Ergotism:
<< Early symptoms of poisoning include nausea, vomiting, muscle pain and weakness, numbness, itching, and rapid or slow heartbeat. Ergot poisoning can progress to gangrene, vision problems, confusion, spasms, convulsions, unconsciousness, and death.>>
I don't know how that fits with the Salem witch trials but there you go
I have found what could possibly be some ergot bodies on some wild grass at our roadside, but I'm not convinced. Usually they grow into horrible black long deformed grains, which fall to the ground and develop over the winter to infect grasses the following year