Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 17:902-905 (1977)
© 1977 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Flaming Grain Sorghum to Delay Flowering1

R. L. Vanderlip, J. D. Ball, P. J. Banks, F. N. Reece and S. J. Clark2

Hybrid sorghum [Sorghum bicolor, (L.) Moench] seed production often involves parental lines that differ in maturity and which do not flower simultaneously. Flaming of sorghum plants during their early stages of development was studied to determine if that treatment would delay flowering so that both parents could be planted at one time and still flower together. Flaming significantly delayed flowering in all experiments. As severity of flaming increased, as obtained by altering speed of travel and stage of plant development at which flaming occurred, delays increased ranging from 0 to 12 days. Experiments with six parental lines indicated that each line must be tested to determine its response to severity of flaming. Both head count and yield reduction occurred when flaming severity was great enough to cause delays in half bloom of 4 to 6 days.

Key Words: Seed production • Half bloom • Yield • Stage of development • Synchronization of flowering

1 Contribution No. 1623-j, Agronomy Dep. and No. 235-j, Agricultural Engineering Dep., Kansas Agric. Exp. Stn., Manhattan, KS 66506. Supported by funds from the Kansas L-P Gas Assoc., Natural Gas Processors Assoc., National LP Gas Assoc., Phillips Petroleum Co., and Garst and Thomas Hybrid Corn Co.

2 Agronomist, former graduate research assistants, Dep. of Agronomy, former assistant professor of agricultural engineering and associate professor of agricultural engineering.

Received for publication December 27, 1976.




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Copyright © 1977 by the Crop Science Society of America.