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Duration and Intensity of Unicorn-Plant (Proboscidea louisianica) Interference with Cotton (Gossypium hirsutum)

Published online by Cambridge University Press:  12 June 2017

Michael S. Riffle ,
Don S. Murray ,
Laval M. Verhalen  and
David L. Weeks
Michael S. Riffle
Affiliation:
Dep. Agron, Okla. State Univ., Stillwater, OK 74078
Don S. Murray
Affiliation:
Dep. Agron, Okla. State Univ., Stillwater, OK 74078
Laval M. Verhalen
Affiliation:
Dep. Agron, Okla. State Univ., Stillwater, OK 74078
David L. Weeks
Affiliation:
Dep. Stat., Okla. State Univ., Stillwater, OK 74078
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Abstract

The duration and intensity of unicorn-plant interference on lint yield of cotton were evaluated in the field. Random densities of 5.5 ± 1.1 unicorn-plant/m2 reduced lint yield by 41 kg/ha or about 5% for each week that unicorn-plant was present. Interference by 4, 8, and 12 weeds/10 m row decreased yield by 22, 49, and 56 kg/ha, respectively, for each week of weed interference. Each 1 kg/ha of unicorn-plant dry weight reduced lint yield by 0.26 kg/ha. Linear regression of weed dry weight could be used to predict cotton lint yield changes regardless of duration or intensity of weed interference.

Keywords

Unicorn-plant, Proboscidea louisianica (Mill.) Thellung #3 PROLOcotton, Gossypium hirsutum L., ‘Paymaster 145’Competitiontime of weed removalweed densityintraspecific interferencedevils-clawPROLO
Type
Research
Information
Weed Technology , Volume 3 , Issue 2 , June 1989 , pp. 313 - 316
Copyright
Copyright © 1989 by the Weed Science Society of America 

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References

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