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Published online 1 November 1990
Published in Agron J 82:1107-1109 (1990)
© 1990 American Society of Agronomy
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Genotype and Topping Stage in Relation to Maturity in Burley Tobacco

W. T. Kelley and D. T. Bowman*

Dep. of Plant and Soil Sci., Box 1071, Univ. of Tennessee, Knoxville, TN 37901-1071
Crop Science Dep., Box 8604, North Carolina State Univ., Raleigh, NC 27695-8604

* Corresponding author.

The danger of frost damage on hurley tobacco (Nicotiana tabacum L.) is an ever present risk to growers in western North Carolina. Therefore, a study was initiated to investigate the effects of topping stage and use of early and late-flowering genotypes on maturity. Four genotypes (‘TN 86’, ‘VA 509’, m.s. Burley 21 x L8, and ‘m.s. Ky 14 x L8’) and three topping stages (early button, elongated button, and full flower) were examined at two locations (Laurel Springs and Waynesville, NC) in 1986 and 1987. Maturity was assessed by visually examining color of the tenth leaf from the bottom of the plant using a scale which is highly correlated with relative concentrations of chlorophylls and carotenoids and is based on the Munsell Color Charts for Plant Tissues. Data on color at harvest were analyzed. Late-flowering cultivars, TN 86 and VA 509, were found to be paler in color at harvest. The paler color at harvest of the cultivars did not always translate into better quality tobacco in the cured leaf state. Choice of cultivar for short-season environments should not necessarily be based on flowering date but on final quality of the cured leaf based on data collected over several seasons.

Paper no. 12004 of the Journal Series of the North Carolina Agric. Res. Serv., Raleigh, NC 27695-7643.

Received for publication May 21, 1990.




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Copyright © 1990 by the American Society of Agronomy.