Ergot of Rye

Marcus Lopez

 

Two different angles of ergot infected rye

One potential downside to growing organic rye, is ergot infection. Claviceps purpurea is a parasitic fungus that can infect rye and other cereal crops. The sclerotia of the ergot fungus contains alkaloids which can be fatal to livestock and humans if ingested. Scout for a honeydew being produced from the flowers, and the sclerotia (pictured) after anthesis is complete. Sclerotia were noticed here in early to mid July.

 

 

Ergot infected quack grass (alternate host)           Ergot infected quack grass (alternate host)

A large range of grasses can host C. purpurea, so mowing wild grasses and crimping rye before they begin seed production will decrease the rate of infection in your fields.