Aeolius
Adventurer
You HAVE to throw a hag in there... the Corn Dolly :
"...in traditional pagan European culture it was believed that the spirit of the corn... lived amongst the crop, and that the harvest made it effectively homeless... Among the customs attached to the last sheaf of the harvest were hollow shapes fashioned from the last sheaf of wheat or other cereal crops. The corn spirit would then spend the winter in this home until the "corn dolly" was ploughed into the first furrow of the new season."
The poor homeless Corn Dolly will be quite upset that the ritual was disturbed.
Or, if you're going for a more natural approach: Corn Smut
Envision a fungus overtaking the corn and spreading to those creatures that ate the crop. Using either yellow musk creepers or russet mold as a basis, imagine the state of the wildlife near that crop!
"...in traditional pagan European culture it was believed that the spirit of the corn... lived amongst the crop, and that the harvest made it effectively homeless... Among the customs attached to the last sheaf of the harvest were hollow shapes fashioned from the last sheaf of wheat or other cereal crops. The corn spirit would then spend the winter in this home until the "corn dolly" was ploughed into the first furrow of the new season."
The poor homeless Corn Dolly will be quite upset that the ritual was disturbed.
Or, if you're going for a more natural approach: Corn Smut
Envision a fungus overtaking the corn and spreading to those creatures that ate the crop. Using either yellow musk creepers or russet mold as a basis, imagine the state of the wildlife near that crop!