Weed Technology (1998) 12, 230-234

Jose P. Morales-Payan, Bielinski M. Santos, William M. Stall and Thomas A. Bewick (1998)
Interference of purple nutsedge (Cyperus rotundus) population densities on bell pepper (Capsicum annuum) yield as influenced by nitrogen
Weed Technology 12 (2), 230-234
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.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): J. Pablo Morales-Payan, Bielinski M. Santos

Research topic(s) for pests/diseases/weeds:
damage/losses/economics
environment - cropping system/rotation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Cyperus rotundus (weed)	Green pepper/chilli (Capsicum)