should be minimal, if any. If the cause of the root restriction continues to affect plant growth for some time (e.g., soil compaction, grub feeding), then the purpling may continue for some time and some yield loss may result if the plants become stunted. Remember that the effects of early season damage to the seed or root system can be magnified when corn is already developing slowly due to cool, cloudy weather. White corn historically was often blamed on the herbicide clomazone (e.g., Command), but can also be caused injury by the herbicide isoxaflutole (e.g., Balance) and by spray drift of glyphosate (e.g., Roundup). Single white plants in a field are usually genetic mutants. For other information about corn, take a look at the Corn Growers Guidebook on the World Wide Web at http://www.kingcorn.org It is the policy of the Purdue Agronomy Department that all persons shall have equal opportunity and access to its programs and facilities without regard to race, color, sex, religion, national origin, age, or disability. Purdue University is an Affirmative Action employer. This material may be available in alternative formats.