Selectivity of pre-and post-emergence herbicides to very-early maturing soybean cultivars

  • Felipe Guilherme Ferreira Fornazza Universidade Estadual de Maringá/UEM
  • Jamil Constantin Universidade Estadual de Maringá/UEM Núcleo de Estudos Avançados em Ciência das Plantas Daninhas (NAPD/UEM)
  • Fellipe Goulart Machado Universidade Estadual de Maringá/UEM Núcleo de Estudos Avançados em Ciência das Plantas Daninhas (NAPD/UEM)
  • Rubem Silvério de Oliveira Jr. Universidade Estadual de Maringá/UEM Núcleo de Estudos Avançados em Ciência das Plantas Daninhas (NAPD/UEM)
  • Gustavo Delabio da Silva Universidade Estadual de Maringá/UEM Núcleo de Estudos Avançados em Ciência das Plantas Daninhas (NAPD/UEM)
  • Fabiano Aparecido Rios Universidade Estadual de Maringá/UEM Núcleo de Estudos Avançados em Ciência das Plantas Daninhas (NAPD/UEM)

Abstract

The combination of pre- and post-emergence herbicides may affect their selectivity to soybean plants, especially to short-cycle cultivars. The objective of this work was to evaluate the selectivity of pre- and post-emergence herbicides to very-early maturing soybean cultivars. Two field experiments were conducted, one in Mandaguaçu, Paraná (E1) and other in Rio Verde, Goiás (E2), Brazil, using a 4×7 factorial arrangement. The treatments consisted of four pre-emergence herbicide managements (S-metolachlor at 1440 g ha-1, diclosulam at 25.2 g ha-1, sulfentrazone at 300 g ha-1, and no herbicide application); and seven post-emergence herbicide managements (lactofen at 120 g ha-1, chlorimuron-ethyl at 12.5 g ha-1, bentazon at 720 g ha-1, lactofen at 120 g ha-1 + chlorimuron-ethyl at 12.5 g ha-1, glyphosate at 900 g a. e. ha-1, two sequential glyphosate applications at 720 g a. e. ha-1 each, and no herbicide application). The early-maturing soybean cultivars evaluated showed sensitivity to the herbicides used. The combined use of pre- and post-emergence herbicides increased the occurrence of injuries in the plants. Diclosulam and sulfentrazone were the least selective pre-emergence herbicides. All herbicide combinations used affected soybean grain yield in E1; lactofen, chlorimuron, and bentazon presented the least selectivity in E2.

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Author Biography

Fellipe Goulart Machado, Universidade Estadual de Maringá/UEM Núcleo de Estudos Avançados em Ciência das Plantas Daninhas (NAPD/UEM)
Doutorando em Agronomia. Núcleo de Estudos Avançados em Ciência das Plantas Daninhas (NAPD/UEM)
Published
04-01-2019
How to Cite
Fornazza, F. G., Constantin, J., Machado, F., Oliveira Jr., R., da Silva, G., & Rios, F. (2019). Selectivity of pre-and post-emergence herbicides to very-early maturing soybean cultivars. Comunicata Scientiae, 9(4), 649-658. https://doi.org/10.14295/cs.v9i4.2755
Section
Original Article