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Interference from Established Stands of Silverleaf Nightshade (Solanum elaeagnifolium) on Cotton (Gossypium hirsutum) Lint Yield

Published online by Cambridge University Press:  12 June 2017

Brenda S. Smith ,
John A. Pawlak ,
Don S. Murray ,
Laval M. Verhalen  and
J. D. Green
Brenda S. Smith
Affiliation:
Dep. Agron., Oklahoma State Univ., Stillwater, OK 74078
John A. Pawlak
Affiliation:
Dep. Agron., Oklahoma State Univ., Stillwater, OK 74078
Don S. Murray
Affiliation:
Dep. Agron., Oklahoma State Univ., Stillwater, OK 74078
Laval M. Verhalen
Affiliation:
Dep. Agron., Oklahoma State Univ., Stillwater, OK 74078
J. D. Green
Affiliation:
Dep. Agron., Oklahoma State Univ., Stillwater, OK 74078
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Abstract

Field experiments were conducted in 1985 and 1986 under eight environments to evaluate the population dynamics of a range of silverleaf nightshade densities and to measure the effects of those populations on cotton lint yield. Dry weed weights of silverleaf nightshade stands were influenced by growing conditions among years, but were positively related to initial densities as long as 2 yr after establishment. Stem numbers increased as initial densities and stand age increased. A negative linear relationship existed between cotton lint yield and weed biomass and between cotton lint yield and stem number from both 1- and 2-yr-old weed stands. For each 1 kg/10 m of row increase in dry weed weight from 1- and 2-yr-old stands, a 9 and 21% lint yield loss/ha was predicted, respectively. For each stem/10 m of row, a 0.35 and 0.31% yield loss was predicted, respectively. Late-planted cotton was less vulnerable to yield reductions by silverleaf nightshade; however, its yield potential was also less.

Keywords

Silverleaf nightshade, Solanum elaeagnifolium Cav. ♯ SOLELcotton, Gossypium hirsutum L. ‘Westburn M’ and ‘Paymaster 145’Population dynamicsperennial weedcompetitionweed biomassSOLEL
Type
Weed Biology and Ecology
Information
Weed Science , Volume 38 , Issue 2 , March 1990 , pp. 129 - 133
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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