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Published in Crop Sci 13:760-761 (1973)
© 1973 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Example of the Effects of Early Season Frost Damage on Yield of Corn

D. C. Arny and C. D. Upper2

Nondamaged corn (Zea mays L.) plants yielded significantly more (about 8,500 kg/ha) than plants in the same field showing six or more damaged leaves per plant (about 6,000 kg/ha) as a result of a frost on June 23, 1972. No plants in any of the plots were killed. Kernel weights were 69 (nondamaged) and 61 (damaged) g/200 kernels. Maturity was also delayed as indicated by later tasseling and higher (30%) moisture content of ears in damaged plots than in nondamaged (27%) at harvest.

Key Words: Zea mays L. • Maize

2 Professor of Plant Pathology; and Research Chemist, ARS, USDA, and Associate Professor of Plant Pathology, University of Wisconsin, Madison 53706, respectively.

Received for publication June 2, 1973.




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