See pages 71-73 in the Field Crops Pest Management in Wisconsin bulletin for more information. Stunting plus pruned roots with brown root tips. Causes may range from fertilizer burn to root pathogens. No herbicide specifically burns root tips, but damage from root pathogens may be a secondary effect. Stunting plus onion leafing, root proliferation possible.
Bleached corn leaves, roots normal.
Command carryover or Command drift. Spray drift from both Command formulations can bleach corn. Roundup Ultra spray drift or Roundup Ultra burndown treatment to corn that is just spiking. Very low rates of Roundup Ultra can bleach corn and mimic Command bleaching.