African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6691

Full Length Research Paper

Efficacy of imazapic, halosulfuron and sulfentrazone for Cyperus rotundus L. control in response to weed tuber density

Bruna Pires da Silva
  • Bruna Pires da Silva
  • FCAV-UNESP - Departamento de Biologia Aplicada à Agropecuária, Jaboticabal-SP, Brazil.
  • Google Scholar
Renan Oliveira de Almeida
  • Renan Oliveira de Almeida
  • FCAV-UNESP - Departamento de Biologia Aplicada à Agropecuária, Jaboticabal-SP, Brazil.
  • Google Scholar
Tiago Pereira Salgado
  • Tiago Pereira Salgado
  • HERBAE ? Consultoria e Projetos Agrícolas, Jaboticabal- SP, Brazil.
  • Google Scholar
Pedro Luis da C. A. Alves
  • Pedro Luis da C. A. Alves
  • FCAV-UNESP - Departamento de Biologia Aplicada à Agropecuária, Jaboticabal-SP, Brazil.
  • Google Scholar


  •  Received: 18 December 2013
  •  Accepted: 10 October 2014
  •  Published: 20 November 2014

Abstract

This study determined the efficacy of sulfentrazone, halosulfuron and imazapic applied in preemergence conditions for the control of purple nutsedge (Cyperus rotundus L.) in response to weed tuber density. The tubers were planted in 5 L pots at densities of 6, 18, 24, 30 and 36 tubers/pot (133.3, 399.9, 533.2, 665.5 and 799.8 tubers/m2, respectively), and sulfentrazone (800.0 g a.i.ha-1), halosulfuron (112.5 g a.i. ha-1) or imazapic (147.0 g a.i.ha-1) was applied 24 h after planting. The experimental design was the Completely Randomized Design (CRD) in a 5×4 factorial scheme with 4 replications. At the end of the experimental period (60 days after planting), the number of dead and viable tubers, dry biomass of viable tubers, and number and dry biomass of epigean manifestations were determined. The data were analyzed using the F test, and the means were compared using Tukey’s test at 5% probability. Independently of tuber density, sulfentrazone performed better than either imazapic or halosulfuron in controlling nutsedge epigean manifestations and tubers.

 

Key words: Purple nutsedge, chemical control, herbicides, preemergence.