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Distance-of-Influence of Devil's-Claw (Proboscidea louisianica) on Cotton (Gossypium hirsutum)

Published online by Cambridge University Press:  12 June 2017

Kay L. Mercer ,
John A. Pawlak ,
Don S. Murray ,
Laval M. Verhalen ,
Michael S. Riffle  and
Ronald W. McNew
Kay L. Mercer
Affiliation:
now Sales Rep., DuPont Chem. Co., Santa Cruz, CA 95060 Dep. Agron., Oklahoma State Univ., Stillwater, OK 74078
John A. Pawlak
Affiliation:
now Field Res. Spec., Valent USA, Memphis, TN 38139 Dep. Agron., Oklahoma State Univ., Stillwater, OK 74078
Don S. Murray
Affiliation:
now Field Res. Spec., Valent USA, Tallahassee, FL 32303 Dep. Agron., Oklahoma State Univ., Stillwater, OK 74078
Laval M. Verhalen
Affiliation:
now Field Res. Spec., Valent USA, Tallahassee, FL 32303 Dep. Agron., Oklahoma State Univ., Stillwater, OK 74078
Michael S. Riffle
Affiliation:
now Field Res. Spec., Valent USA, Tallahassee, FL 32303 Dep. Agron., Oklahoma State Univ., Stillwater, OK 74078
Ronald W. McNew
Affiliation:
Dep. Stat., Oklahoma State Univ., Stillwater, OK 74078
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Abstract

The distance-of-influence of an individual devil's-claw plant to cotton leaf, stem, boll (reproductive parts), and combined aboveground plant parts was determined in two field experiments. The distance-of-influence could not be detected for the first 6 weeks after emergence; by 9 to 12 weeks, it extended up to 25 cm or more; and by the end of the season, up to 50 cm on each side of the weed. Cotton leaf and stem weights were less sensitive than cotton boll weights for measuring distance-of-influence from devil's-claw. At maturity, cotton boll weight was reduced 62 and 51% in 1983 and 45 and 29% in 1984 for sampling intervals of 0 to 25 and 25 to 50 cm, respectively. Interference from cotton reduced devil's-claw stem weight, seed capsule weight, and whole plant biomass by 6 weeks after emergence and reduced leaf biomass by 9 weeks in 1983. All except stem biomass were affected in 1984. Distance-of-influence and weed-density interference studies predicted lint yield loss similarly.

Keywords

Devil's-claw, Proboscidea louisianica (Mill.)Thellung ♯3 PROLOcotton, Gossypium hirsutum L. ‘Westburn M’Competitionunicorn-plantweed biomasscrop biomasssphere-of-influenceboll productionPROLO
Type
Research
Information
Weed Technology , Volume 4 , Issue 1 , March 1990 , pp. 87 - 91
Copyright
Copyright © 1990 Weed Science Society of America 

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References

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