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Datura stramonium interference and seed rain in Gossypium hirsutum

Published online by Cambridge University Press:  20 January 2017

George H. Scott ,
Shawn D. Askew ,
John W. Wilcut  and
Cavell Brownie
George H. Scott
Affiliation:
Crop Science Department, Box 7620, North Carolina State University, Raleigh, NC 27695-7620
Shawn D. Askew
Affiliation:
Crop Science Department, Box 7620, North Carolina State University, Raleigh, NC 27695-7620
Cavell Brownie
Affiliation:
Department of Statistics, Box 8203, North Carolina State University, Raleigh NC 27695-8203
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Abstract

Experiments were conducted in 1998 and 1999 at the Central Crops Research Station near Clayton, NC, to evaluate density-dependent effects of Datura stramonium on weed growth and seed rain and Gossypium hirsutum growth and yield. Datura stramonium height was not affected by density in either year. Crop height never exceeded weed height during the growing season, indicating that competition for light occurred between the two species. Eight weeks after planting or later, G. hirsutum height decreased as D. stramonium density increased. An increase in D. stramonium density from 1 to 32 plants (9.1 m of row)−1 resulted in a decrease in capsule production per plant of 92 and 60 in 1998 and 1999, respectively. Total D. stramonium dry weight per 9.1 m of row increased via a quadratic relationship as weed density increased. Gossypium hirsutum lint yields decreased as D. stramonium biomass and density increased in both years. Estimated yield losses of 10 and 25% were caused by D. stramonium at 0.5 and 1.5 plants (9.1 m of row)−1 (572 and 1,716 plants ha−1), respectively, in 1998 and 0.6 and 1.8 plants (9.1 m of row)−1 (690 and 2,060 plants ha−1), respectively, in 1999.

Keywords

Datura stramonium L. DATST, jimsonweedGossypium hirsutum L., ‘Deltapine 51’, cottonCompetitioneconomic thresholdsmodelsseed productionDATST
Type
Research Article
Information
Weed Science , Volume 48 , Issue 5 , October 2000 , pp. 613 - 617
Copyright
Copyright © Weed Science Society of America 

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