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Competitive interactions of tomato (Lycopersicon esculentum) and nutsedges (Cyperus spp.)

Published online by Cambridge University Press:  12 June 2017

Bielinski M. Santos ,
Thomas A. Bewick ,
William M. Stall  and
Donn G. Shilling
Thomas A. Bewick
Affiliation:
Horticultural Sciences Department, University of Florida, Gainesville, FL 32611
William M. Stall
Affiliation:
Horticultural Sciences Department, University of Florida, Gainesville, FL 32611
Donn G. Shilling
Affiliation:
Agronomy Department, University of Florida, Gainesville, FL 32611
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Abstract

Replacement series experiments were conducted under greenhouse conditions to evaluate effects of population densities and proportions on the intraspecific and interspecific interference of either purple nutsedge or yellow nutsedge with tomato cv. Sunny, under nonlimiting conditions of water and nutrients. When grown with either nutsedge species for 40 d, tomato dry weight per plant increased and dry weight per plant of nutsedge decreased as their relative proportions decreased in mixture. Relative yield analysis indicated tomato is a stronger competitor than either nutsedge species. Both nutsedges appeared to be weak interspecific competitors but strong intraspecific competitors. Attenuated light on a purple nutsedge canopy showed that tomato additions can reduce light received by the weed compared to pure nutsedge stands.

Keywords

Yellow nutsedge, Cyperus esculentus L. CYPESpurple nutsedge, Cyperus rotundus L. CYPROtomato, Lycopersicon esculentum MillReplacement seriesrelative yieldrelative yield totaltomato competitivenessnutsedge competitionCYPESCYPRO
Type
Weed Biology and Ecology
Information
Weed Science , Volume 45 , Issue 2 , April 1997 , pp. 229 - 233
Copyright
Copyright © 1997 by the Weed Science Society of America 

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