African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6091

Full Length Research Paper

Seed treatment and pre-inoculation of soybean: effect of storage period and agrochemicals on the physiological quality of seed and yield

Itacir Eloi Sandini
  • Itacir Eloi Sandini
  • Department of Agronomy, Universidade Estadual do Centro-Oeste (UNICENTRO), Rua Simeão Camargo Varela de Sá, 03, Vila Carli, 85040-080, Guarapuava, Paraná, Brazil.
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Rafael Brugnera Belani
  • Rafael Brugnera Belani
  • BASF S/A, Alameda Adélia Salvador Bernardo, 243, 13917-196, Jaguariúna, São Paulo, Brazil.
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Margarete Kimie Falbo
  • Margarete Kimie Falbo
  • Department of Veterinary Medicine, Universidade Estadual do Centro-Oeste (UNICENTRO), Rua Simeão Camargo Varela de Sá, 03, Vila Carli, 85040-080, Guarapuava, Paraná, Brazil.
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Fabiano Pacentchuk
  • Fabiano Pacentchuk
  • Department of Agronomy, Universidade Estadual do Centro-Oeste (UNICENTRO), Rua Simeão Camargo Varela de Sá, 03, Vila Carli, 85040-080, Guarapuava, Paraná, Brazil.
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Jaqueline Huzar-Novakowiski
  • Jaqueline Huzar-Novakowiski
  • College of Agronomy and Veterinary Medicine – FAMV, Universidade de Passo Fundo – UPF, Avenida Brasil Leste, 285, São José, 99052-900, Passo Fundo, Rio Grande do Sul, Brazil.
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  •  Received: 29 August 2018
  •  Accepted: 05 December 2018
  •  Published: 17 January 2019

Abstract

Industrial seed treatment of soybean [Glycine max (L.) Merr.] has increased over the last years. New technologies have been developed to allow the inoculation procedure, which is traditionally done at the day of sowing, to be performed with the industrial treatment days or even weeks before sowing. Since little is known about the compatibility of agrochemicals and pre-inoculation, the objective of this study was to determine whether the storage period and the combination of fungicides and insecticides could negatively affect the physiological quality and yield of soybean seeds that were pre-inoculated. Soybean seeds received fourteen seed treatments that consisted of different fungicides and insecticides and were pre-inoculated with Bradyrhizobium elkanii. The seeds were treated and stored for 51 days until it was sown in the field. Every 17 days the physiological quality of the seed was assessed. The results shown that pre-inoculation did not affect the physiological quality of seeds. However, some combinations of agrochemicals, as well as storage period reduced seed vigor and seed germination, while increased abnormal seedlings. The findings of this study indicated that some combinations of fungicides and insecticides can have adverse effect on the physiological quality of seed that is stored for up to 51 days before sowing, but none of them jeopardized the nodulation and soybean yield under field conditions.

Key words: Biological nitrogen fixation, Bradyrhizobium, compatibility, fungicide, Glycine max, HiCoat, industrial seed treatment, insecticide, polymer.