Selectivity of nicosulfuron and atrazine on different corn hybrids

  • Alberto Leão de Lemos Barroso Universidade de Rio Verde, GO.
  • Hugo Almeida Dan State University of Maringá
  • Lilian Gomes de Moraes Dan Universidade Estadual de Maringá
  • Wander Cruvinel Ferreira Filho Universidade de Rio Verde, GO.
  • Carlos César Evangelista Menezes Universidade de Rio Verde, GO.
  • Luiz Cobiniano Melo Filho Instituto Federal de Rondônia
Keywords: Atrazine, post-emergence, ALS inhibitors, Zea mays

Abstract

Nicosulfuron and atrazine are herbicides widely used for weed control on corn crops. However, itsselectivity is often fairly questionable due to genotypic variability of hybrids in the market. In thiscontext, this study aims to assess both nicosulfuron selectivity and atrazine mixture in 34 corn hybrids.Treatment was arranged in a completely randomized block design, in a split-plot scheme (34x5)with four replicates, in which corn hybrids constituted the plots and herbicides the subplots. 34 cornhybrids were submitted to four herbicide treatments: nicosulfuron (rates of 50 and 60 g ha-1) andnicosulfuron + atrazine (20 + 1500 and 40 + 3000 g ha-1) as well as a non treated check for each hybrid.Application was performed at 19 days (V4/V5) after corn emergence. Phytointoxication symptomswere assessed at 7; 14 and 21 days after treatment application. One thousand grain weight andhybrid yield were also determined. Based on the results, it was observed that the phytotoxic effectsof nicosulfuron+atrazine (40+3000 g ha-1) were enough to reduce the weight of 1000 seeds in hybridsBMX61, BMX750, and NB7405. Nevertheless, herbicide treatments, either alone or associated withatrazine, were selective to the 34 genotypes studied.

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Author Biographies

Alberto Leão de Lemos Barroso, Universidade de Rio Verde, GO.
Professor
Hugo Almeida Dan, State University of Maringá
Depertament of Plant Science, Advanced center of Weed Science.
Lilian Gomes de Moraes Dan, Universidade Estadual de Maringá
Estudante de Pós graduação em Agronomia
Wander Cruvinel Ferreira Filho, Universidade de Rio Verde, GO.
Estudante de Pós graduação em Agronomia
Carlos César Evangelista Menezes, Universidade de Rio Verde, GO.
Professor da Universidade de Rio Verde
Luiz Cobiniano Melo Filho, Instituto Federal de Rondônia
Professor
Published
19-12-2012
How to Cite
Barroso, A. L. de L., Dan, H. A., Dan, L. G. de M., Ferreira Filho, W. C., Menezes, C. C. E., & Melo Filho, L. C. (2012). Selectivity of nicosulfuron and atrazine on different corn hybrids. Comunicata Scientiae, 3(4), 255-262. https://doi.org/10.14295/cs.v3i4.220
Section
Original Article