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

Selectivity of herbicides to erva mate (Ilex paraguariensis) plants

Felipe Adelio de David
  • Felipe Adelio de David
  • Department of Crop Management, Federal University of Fronteira Sul – UFFS, Campus Erechim – 99700 970, Erechim, RS, Brazil.
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Leandro Galon
  • Leandro Galon
  • Department of Crop Management, Federal University of Fronteira Sul – UFFS, Campus Erechim – 99700 970, Erechim, RS, Brazil.
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Gismael Francisco Perin
  • Gismael Francisco Perin
  • Department of Crop Management, Federal University of Fronteira Sul – UFFS, Campus Erechim – 99700 970, Erechim, RS, Brazil.
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Cesar Tiago Forte
  • Cesar Tiago Forte
  • Department of Crop Management, Federal University of Fronteira Sul – UFFS, Campus Erechim – 99700 970, Erechim, RS, Brazil.
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Germani Concenço
  • Germani Concenço
  • Department of Sustainable Crop Management, Embrapa Clima Temperado – 96010 971 Pelotas, RS, Brazil.
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Altemir José Mossi
  • Altemir José Mossi
  • Department of Crop Management, Federal University of Fronteira Sul – UFFS, Campus Erechim – 99700 970, Erechim, RS, Brazil.
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Paula Rochelly de David
  • Paula Rochelly de David
  • Department of Crop Management, Federal University of Fronteira Sul – UFFS, Campus Erechim – 99700 970, Erechim, RS, Brazil.
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Ivana Santos Moisinho
  • Ivana Santos Moisinho
  • Department of Sustainable Crop Management, Embrapa Clima Temperado – 96010 971 Pelotas, RS, Brazil.
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  •  Received: 19 July 2017
  •  Accepted: 29 August 2017
  •  Published: 30 November 2017

Abstract

Herbicides can cause negative effects on the morphophysiological characteristics of agricultural crops when proper knowledge about their selectivity is not available. For erva-mate plantations, herbicides which are registered and recommended are scarce. In this sense, this study was carried out to evaluate the selectivity of herbicides applied in different doses to erva-mate. The experiment was installed in a greenhouse at the Federal University of Fronteira Sul (UFFS), Campus Erechim, state of Rio Grande do Sul (RS), Brazil. The experimental design was a randomized block, arranged in a 7 × 4 factorial scheme, with four replications. Factor A comprised the herbicides (tembotrione, chlorimuron-ethyl, oxyfluorfen, sethoxydim + diclosulam, metsulfuron-methyl, Fomesafen + fluazifop-p-butyl and nicosulfuron) and factor B comprised the doses of these herbicides (0, 0.5, 1 and 2‑fold the recommended dose for other crops, on the respective herbicide labels). The phytotoxicity, plant height, stem diameter, dry mass of shoots and roots, chlorophyll content, sub-stomatal CO2 concentration, photosynthetic rate, CO2 consumed, stomatal conductance of water vapors, transpiration rate, and water use efficiency were assessed. Oxyfluorfen, fomesafen + fluazifop-p-butyl and nicosulfuron affected the morphophysiological characteristics of erva-mate plants at all doses tested. The chlorimuron-ethyl and sethoxydim + diclosulam were presented as being potential to be used in erva-mate plantations until 2‑fold the label dose, because they present low plant toxicity and reduced interference in the morphophysiological characteristics of erva-mate.

Key words: Chlorimuron-ethyl, alternative crop, chemical management.