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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
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

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.

Type
Weed Biology and Ecology
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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