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

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

How to Cite

VIVIAN, R.; JAKELAITIS, A.; SILVA, A. A. da; RIBEIRO JUNIOR, J. I.; FRANCO, R. B.; MASSIGNAN, L. F. D. EFFECT OF THE AMETRYN + TRIFLOXYSULFURON-SODIUM COMMERCIAL MIXTURE ON Cyperus rotundus L. SPECIES. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], Goiânia, v. 38, n. 2, p. 63–70, 2008. Disponível em: https://revistas.ufg.br/pat/article/view/4152. Acesso em: 23 nov. 2024.

Issue

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

Section

Research Article

License

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