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Interference of Purple Nutsedge (Cyperus rotundus) Population Densities on Bell Pepper (Capsicum annuum) Yield as Influenced by Nitrogen

Published online by Cambridge University Press:  12 June 2017

Jose P. Morales-Payan ,
Bielinski M. Santos ,
William M. Stall  and
Thomas A. Bewick
Jose P. Morales-Payan
Affiliation:
Horticulture Science Department, University of Florida, Gainesville, FL 32611-0690
Bielinski M. Santos
Affiliation:
Horticulture Science Department, University of Florida, Gainesville, FL 32611-0690
William M. Stall
Affiliation:
Horticulture Science Department, University of Florida, Gainesville, FL 32611-0690
Thomas A. Bewick
Affiliation:
Horticulture Science Department, University of Florida, Gainesville, FL 32611-0690
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Abstract

Additive series studies were conducted under greenhouse conditions to determine the effects of nitrogen (N) rate and purple nutsedge densities on the yield of ‘California Wonder’ bell pepper. Initial densities of purple nutsedge were 0, 100, 200, and 300 plants/m2. Nitrogen was applied at 70, 140, and 210 kg/ha. Plants were allowed to interfere for 10 wk. There were significant purple nutsedge population density by N rate interactions on bell pepper fruit yield. At 70 kg N/ha, no significant effect of weed population densities was found on fruit yield, whereas at the rates of 140 and 210 kg N/ha there were significant nutsedge density effects. As N rates and nutsedge densities increased, so did purple nutsedge biomass. Linear regression models described the interference. Bell pepper fruit yield reduction was 73% at 210 kg N/ha with an initial nutsedge population density of 300 plants/m2.

Keywords

Bell pepper, Capsicum annuum L.purple nutsedge, Cyperus rotundus L. #3 CYPROWeed interferencevegetable weed managementnitrogen effect on weedscompetition for nutrients
Type
Research
Information
Weed Technology , Volume 12 , Issue 2 , June 1998 , pp. 230 - 234
Copyright
Copyright © 1998 by the Weed Science Society of America 

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