Published at the Chat 'n Chew Cafe, May 2000

Photo Gallery:
Unusual Twisted Whorls in Corn

R.L. (Bob) Nielsen
Agronomy Dept., Purdue Univ.
West Lafayette, IN 47907-1150
Email address:
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These images depict the phenomenon known as 'twisted whorl' in corn. The first four images were taken 26 May 2000 of corn that was at the leaf stage V4 (four visible leaf collars). Several days before, no twisted whorls were seen in the field.

The final three images were taken in 1996 of corn that was several leaves older in development.

Click on image to load larger version.
Image 1:

Three plants in a row with twisted whorls, surrounded by plants with 'normal' whorls. Plants are about leaf stage V4.
Image 2:

Closer view of plant with twisted whorl. Plants are about leaf stage V4.
Image 3:

Whole plant view. Plants are about leaf stage V4.
Image 4:

Closeup view of crinkled leaves bound tightly in whorl.
Image 5:

Older plant (about V6) with similar symptom.
Image 6:

'Yellow tops' visible in field after twisted whorls finally unwrap.
Image 7:

Closeup of yellow leaf after whorl unwrapped.
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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.
© 2000, Purdue University
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