African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6544

Full Length Research Paper

Residual of the mixture of glyphosate and 2,4-d herbicides on yellow red latosol with soybean cultivation

Sérgio Plens Andrade
  • Sérgio Plens Andrade
  • Tropical Agriculture, Federal University of Mato Grosso, Av. Fernando Correa da Costa, 2367, Boa Esperança, Cuiabá, Mato Grosso, CEP: 78.060-900 Brazil.
  • Google Scholar
Dionanta Silva Fernandes
  • Dionanta Silva Fernandes
  • Faculty of Agronomy, Federal University of Mato Grosso, Av. Alexandre Ferronato, 1200, Setor Industrial, Sinop, Mato Grosso, Brazil. CEP: 78.557-267.
  • Google Scholar
Sayonara Andrade Couto Moreno Arantes
  • Sayonara Andrade Couto Moreno Arantes
  • Faculty of Agronomy, Federal University of Mato Grosso, Av. Alexandre Ferronato, 1200, Setor Industrial, Sinop, Mato Grosso, Brazil. CEP: 78.557-267.
  • Google Scholar
Kelte Resende Arantes
  • Kelte Resende Arantes
  • Faculty of Agronomy, Federal University of Mato Grosso, Av. Alexandre Ferronato, 1200, Setor Industrial, Sinop, Mato Grosso, Brazil. CEP: 78.557-267.
  • Google Scholar
Gláucio Cruz Genúncio
  • Gláucio Cruz Genúncio
  • Faculty of Agronomy, Federal University of Mato Grosso, Av. Alexandre Ferronato, 1200, Setor Industrial, Sinop, Mato Grosso, Brazil. CEP: 78.557-267.
  • Google Scholar
Cassiano Spaziani Pereira
  • Cassiano Spaziani Pereira
  • Faculty of Agronomy, Federal University of Mato Grosso, Av. Alexandre Ferronato, 1200, Setor Industrial, Sinop, Mato Grosso, Brazil. CEP: 78.557-267.
  • Google Scholar
Emanuele Veiga
  • Emanuele Veiga
  • Faculty of Agronomy, Federal University of Mato Grosso, Av. Alexandre Ferronato, 1200, Setor Industrial, Sinop, Mato Grosso, Brazil. CEP: 78.557-267.
  • Google Scholar


  •  Received: 04 June 2021
  •  Accepted: 26 July 2021
  •  Published: 31 August 2021

Abstract

The objective of this study was to evaluate the residual effect of glyphosate and 2.4-D herbicides in the initial development of the soy crop in a Yellow Red Latosol. The experiment was conducted in randomized design, consisting of 4 different doses of herbicides (0, 1, 2 and 5 times the recommended dose of the glyphosate and 2.4-D mixture), applied at intervals of 0, 3, 7 and 10 days before sowing, with 4 repetitions on a soybean culture (Monsoy 8372rr cultivar) performed up to 28 days after sowing, at 7 days intervals. The variables analyzed were plant height, leaf area, phytotoxicity, aerial dry biomass, root dry biomass and chlorophylls a and b, the latter being performed from the second evaluation after sowing. For the conditions evaluated, plant height, leaf area and aerial dry biomass were lower in the plants that received the highest doses of the glyphosate mixture and 2.4-D. The higher doses of glyphosate and 2.4-D resulted in higher symptoms of phytotoxicity in transgenic soy plants. The periods of application of the glyphosate herbicide mixture plus 2.4-D closer to the date of sowing of the soybean were the ones that most harmed the development of the crop.

Key words: Transgenic soy, phytotoxicity, initial development.

Abbreviation

UFMT, Federal University of Mato Grosso; RYLd, Red Dystrophic Yellow Latosol;  RPTN, Relative Power of Total Neutralization; NPK, Nitrogen, Phosphorus, Potassium; CRD, Completely Randomized Design; RDM, Recommended Doses of the Herbicide Mixture; DAS, Days after Sowing; DBS, Days before Sowing;