EFFECT OF THE AMETRYN + TRIFLOXYSULFURON-SODIUM COMMERCIAL MIXTURE ON Cyperus rotundus L. SPECIES

Authors

  • Rafael Vivian USP
  • Adriano Jakelaitis UFRO
  • Antonio Alberto da Silva UFV
  • José Ivo Ribeiro Junior
  • Roberta Bracher Franco USP
  • Luiz Fernando Druzina Massignan USP

DOI:

https://doi.org/10.5216/pat.v38i2.4152

Keywords:

Herbicides, application period, purple nutsedge

Abstract

The objective of this experiment was to evaluate, at greenhouse conditions, the effect of combined doses (1.0 kg ha-1, 1.5 kg ha-1, and 2.0 kg ha-1) and time of spraying (pre and postemergence), of the commercial mixture ametryn + trifloxysulfuronsodium (A+TS), on Cyperus rotundus L. control, in comparison with the treatments 1.0 kg ha-1 (pre-emergence) + 1.0 kg ha-1 (post-emergence) of the same commercial mixture, and 0.9 kg ha-1 of sulfentrazone in pre-emergence, besides the control treatment (without herbicide). A higher efficiency level was verified in the reduction of dry mass and shoot number of C. rotundus for the post-emergence treatments with A+TS, which did not differ between the applications of 1.5kg ha-1 and 2.0 kg ha-1, or even in 1.0 kg ha-1 in pre-emergence + 1.0 kg ha-1 in post-emergence of ametryn + trifloxysulfuron-sodium (A+TS). However, the treatments in pre-emergence with 2.0 kg ha-1 of the commercial mixture and 0.90 kg ha-1 of sulfentrazone showed to be superior to the remaining, concerning the reduction in number and weight of living tubers. The dose of 2.0 kg ha-1 in pre-emergence was the only efficient treatment in the reduction of C. rotundus, mostly for the evaluation carried out 90 days after spraying. Besides, the estimations of 1.27 kg ha-1 and 1.04 kg ha-1 of the ametryn + trifloxysulfuron-sodium in post-emergency were sufficient for dry mass and shoot number C. rotundus suppression.

KEY-WORDS: Herbicides; application period; purple nutsedge.

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Author Biographies

  • Rafael Vivian, USP
    Escola Superior de Agricultura Luiz de Queiroz, ESALQ/USP, Piracicaba, SP.
  • Adriano Jakelaitis, UFRO
    Universidade Federal de Rondônia, Rolim de Moura, RO.
  • Antonio Alberto da Silva, UFV
    Universidade Federal de Viçosa, Campus Universitário, 36571-000, Viçosa, Minas Gerais
  • José Ivo Ribeiro Junior
    Universidade Federal de Viçosa, Campus Universitário, 36571-000, Viçosa, Minas Gerais
  • Roberta Bracher Franco, USP
    Escola Superior de Agricultura Luiz de Queiroz, ESALQ/USP, Piracicaba, SP.
  • Luiz Fernando Druzina Massignan, USP
    Escola Superior de Agricultura Luiz de Queiroz, ESALQ/USP, Piracicaba, SP.

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Published

2008-06-30

Issue

v. 38, n. 2, Apr./Jun. 2008

Section

Research Article

License

Authors will not be paid for published articles and must waive their copyright in favor of the PAT journal. On the other hand, they are solely responsible for the content of those articles, even if the Editor holds the right to adjust them to the norms of the journal. Authors are allowed to publish their articles simultaneously in their institutional repositories, as soon as the original publication at the PAT journal is mentioned.

How to Cite

VIVIAN, R. et al. EFFECT OF THE AMETRYN + TRIFLOXYSULFURON-SODIUM COMMERCIAL MIXTURE ON Cyperus rotundus L. SPECIES. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], v. 38, n. 2, p. 63–70, 30 Jun.2008.