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The Effect of Light and Temperature on the Growth and Development of Johnsongrass

Published online by Cambridge University Press:  12 June 2017

C. G. McWhorter  and
T. N. Jordan
C. G. McWhorter
Affiliation:
S. Weed Sci. Lab., Agr. Res. Serv., U.S. Dep. Agr., Stoneville, MS 38776
T. N. Jordan
Affiliation:
Delta Branch, Mississippi Agr. and Forest. Exp. Sta., Stoneville, MS 38776
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Abstract

Johnsongrass [Sorghum halepense (L.) Pers.] was grown for 4, 8, and 12 weeks at 24, 32, and 40 C at 9, 13, and 19 klux illumination. Maximum growth and development after 12 weeks were obtained at 32 C and 19 klux. Maximum leaf growth and development were obtained at 32 C and 9 klux. Primary culm height and weight were greater at 24 C than at 40 C, regardless of the illumination, whereas secondary culm height and weight were greater at 40 C than at 24 C. Secondary culm production increased at 40 C and decreased at 24 C. Root and rhizome development increased with increasing light intensity. Growth of roots and rhizomes was maximum at 32 C and minimum at 40 C.

Type
Research Article
Information
Weed Science , Volume 24 , Issue 1 , January 1976 , pp. 88 - 91
Copyright
Copyright © 1976 by the Weed Science Society of America 

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References

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