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Wild Poinsettia (Euphorbia heterophylla) Interference by Peanut (Arachis hypogaea)

Published online by Cambridge University Press:  12 June 2017

David C. Bridges ,
Barry J. Brecke  and
James C. Barbour
David C. Bridges
Affiliation:
Dep. Agron., Univ. Georgia, Griffin, GA 30223-1797
Barry J. Brecke
Affiliation:
Univ. Florida, Agric. Res. Educ. Ctr., Jay, FL 32565
James C. Barbour
Affiliation:
Dep. Agron., Univ. Georgia, Griffin, GA 30223-1797
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Abstract

Research was conducted during 1988 and 1989 in Georgia and Florida to determine the densitydependent effects and critical periods of wild poinsettia interference with peanut. Peanut yield loss ranged from 0 to approximately 50% over the wild poinsettia density range from 0 to 32 plants 9 m−1 peanut row. Predicted peanut yield losses across 2 yr in Georgia were 0, 4, 8, 12, 15, 26, 40, and 54% for season-long wild poinsettia interference at densities of 0, 1, 2, 3, 4, 8, 16, and 32 plants 9 m−1 of row, respectively. Across 2 yr in Florida, predicted peanut yield losses were 0, 9, 14, 22, 30, 37, and 41% for wild poinsettia densities of 0, 1, 2, 4, 8, 16, and 32 plants 9 m−1 row, respectively. Peanuts had to be maintained poinsettia free for 10 wk after peanut emergence to prevent yield loss. Wild poinsettia that interfered with peanut for more than 2 wk after peanut emergence reduced peanut yield.

Keywords

Wild poinsettia, Euphorbia heterophylla L. # EPHHLpeanut, Arachis hypogaea L. ‘Florunner’Competitioncritical periods of competitioninterspecific competitionintraspecific competitionEPHHL
Type
Weed Biology and Ecology
Information
Weed Science , Volume 40 , Issue 1 , March 1992 , pp. 37 - 42
Copyright
Copyright © 1992 by the Weed Science Society of America 

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References

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