Historical clue formulations

• Grain disease — 2017-10-10
• Bane of cereal grain — 2016-09-09
• Crop hazard — 2015-07-21
• Field fungus — 2014-05-24
• Plant fungus — 2013-06-11
• Fungus that affects cereal — 2012-09-25
• Grain disease — 2011-11-23
• Grain disease — 2010-05-19
• Plant problem — 2009-04-24
• Cereal killer — 2008-08-10
• Rye malady — 2007-09-02
• Grain bane — 2007-01-10
• Grain disease — 2006-04-09
• Headache for a grain farmer — 2005-02-27
• Corn problem — 2004-07-31
• Cereal killer — 2004-07-02
• Plant problem — 2003-01-18
• Grain disease — 2002-12-10
• Problem for a grain farmer — 2001-10-13
• Cereal killer — 1998-11-27
• Grain disease — 1996-11-20
• Crop fungus — 1996-07-06
• Crop problem — 1996-03-10
• Rye fungus — 1995-11-22
• Grass fungus — 1994-03-20