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Florida Beggarweed (Desmodium tortuosum) Growth and Development in Peanuts (Arachis hypogaea)

Published online by Cambridge University Press:  12 June 2017

John Cardina  and
Barry J. Brecke
John Cardina
Affiliation:
USDA-ARS, Coastal Plain Exp. Stn., Tifton, GA 31793
Barry J. Brecke
Affiliation:
Univ. Fla., Agric. Res. Educ. Cent., Jay, FL 32565
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Abstract

Temporal changes in factors that contribute to the competitiveness of Florida beggarweed in peanuts were studied in 1986 and 1987. Florida beggarweed leaves were unifoliolate to the ninth node and trifoliolate thereafter. Peanuts grew taller than Florida beggarweed until the R-3 stage of peanuts, after which Florida beggarweed height increased logarithmically. Florida beggarweed branching was suppressed by the peanut canopy until the weed overtopped the peanuts. Florida beggarweed dry weight was reduced 80% by peanuts compared with Florida beggarweed grown alone. Peanuts reduced Florida beggarweed leaf area and canopy area. Percent light attenuation as a function of Florida beggarweed canopy area was described by the equation Y = lnX/25.5. Peanut yields in 60 cm of row on either side of a single Florida beggarweed plant were reduced 19%.

Keywords

Florida beggarweed, Desmodium tortuosum (Sw.) DC. ♯ DEDTOpeanut, Arachis hypogaea L. ‘Florunner’Phenologymodelingcanopy developmentcompetition
Type
Research
Information
Weed Technology , Volume 5 , Issue 1 , March 1991 , pp. 147 - 153
Copyright
Copyright © 1990 by the Weed Science Society of America 

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