NEWS
Production Blog
Pam Smith DTN\Progressive Farmer Crops Technology Editor
Fri Aug 7, 2015 12:01 PM CDT

AUBURN, Ill. (DTN) -- Are you finding cornstalks dotted with discolorations that look like a preschool class armed with magic markers went wild? Black, brown and purplish polka dots found on the stalk could be purple leaf sheath or Physoderma brown spot.

Field days are a great time to stalk the stalks. Last week I attended a Monsanto event near Auburn, Illinois. It was hotter than blue blazes, but Lance Tarochione, technical agronomist for Asgrow/DeKalb, showed us some curious corn disorders to make sure it wasn't just the heat causing us to see spots.

Purple leaf sheath (sometimes called yeast ...

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