African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6576

Full Length Research Paper

Freezing, cooling and storage of pumpkin (Cucurbita moschata Dusch) seeds produced in biodynamic system

Carolina Olga da Fonseca Ribeiro
  • Carolina Olga da Fonseca Ribeiro
  • Instituto de Agronomia, Departamento de Fitotecnia, Universidade Federal Rural do Rio de Janeiro, Seropédica-RJ, Brasil.
  • Google Scholar
Higino Marcos Lopes
  • Higino Marcos Lopes
  • Instituto de Agronomia, Departamento de Fitotecnia, Universidade Federal Rural do Rio de Janeiro, Seropédica-RJ, Brasil.
  • Google Scholar
Felipe Kuhn Leão de Salles
  • Felipe Kuhn Leão de Salles
  • Instituto de Agronomia, Departamento de Fitotecnia, Universidade Federal Rural do Rio de Janeiro, Seropédica-RJ, Brasil.
  • Google Scholar


  •  Received: 21 August 2017
  •  Accepted: 10 October 2017
  •  Published: 09 November 2017

Abstract

Farmer’s dominance depends on seed processing practices that allow seed longevity and sanity throughout storage. In organic systems, seeds cannot be exposed to chemical pesticides. Therefore, organic seed treatment must be conducted by applying techniques which do not contaminate seeds and that can provide physiological and sanitary quality, and also a safe storage. This work aimed to evaluate the physiological and sanitary quality of pumpkin seeds frozen at -18°C and cooled at 15°C, for 36 h and 7 days in polyethylene terephthalate (PET) bottles and in plastic bags with vacuum. Results showed that freezing seeds at -18°C for 36 h in PET bottle provided an increase in the first count of germination and seedling length reduction. The physiological and sanitary qualities of pumpkin seeds frozen at -18°C for 36 h in PET bottle and stored for up to six months under ambient conditions and in a cold chamber were also evaluated. Refrigerated storage provided increased seed viability as compared to ambient storage. In the sixth month of storage, a reduction of the genera Aspergillus and Penicillium occurred in both environments. 
 
Key words: Freezing, package, storage, vigor, viability, organic seed treatment, Cucurbita moschata Dusch.