African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 5948

Full Length Research Paper

Germination, vigor and pathogen incidence in broccoli seed treated with Carboxin + Thiran

Antonio Ismael Inacio Cardoso*
  • Antonio Ismael Inacio Cardoso*
  • Faculdade de Ciências Agronômicas, Universidade Estadual Paulista, Rua José Barbosa de Barros, 1780, 18610-307, Botucatu, SP, Brazil.
  • Google Scholar
Natalia Brito Lima Lanna
  • Natalia Brito Lima Lanna
  • Faculdade de Ciências Agronômicas, Universidade Estadual Paulista, Rua José Barbosa de Barros, 1780, 18610-307, Botucatu, SP, Brazil.
  • Google Scholar
Priscilla Nataly de Lima Silva
  • Priscilla Nataly de Lima Silva
  • Faculdade de Ciências Agronômicas, Universidade Estadual Paulista, Rua José Barbosa de Barros, 1780, 18610-307, Botucatu, SP, Brazil.
  • Google Scholar
Pamela Gomes Nakada-Freitas
  • Pamela Gomes Nakada-Freitas
  • Faculdade de Ciências Agronômicas, Universidade Estadual Paulista, Rua José Barbosa de Barros, 1780, 18610-307, Botucatu, SP, Brazil.
  • Google Scholar
Paula Leite dos Santos
  • Paula Leite dos Santos
  • Faculdade de Ciências Agronômicas, Universidade Estadual Paulista, Rua José Barbosa de Barros, 1780, 18610-307, Botucatu, SP, Brazil.
  • Google Scholar
Caroline Geraldi Pierozzi
  • Caroline Geraldi Pierozzi
  • Faculdade de Ciências Agronômicas, Universidade Estadual Paulista, Rua José Barbosa de Barros, 1780, 18610-307, Botucatu, SP, Brazil.
  • Google Scholar
Adriana Zanin Kronka
  • Adriana Zanin Kronka
  • Faculdade de Ciências Agronômicas, Universidade Estadual Paulista, Rua José Barbosa de Barros, 1780, 18610-307, Botucatu, SP, Brazil.
  • Google Scholar


  •  Received: 02 October 2014
  •  Accepted: 17 December 2014
  •  Published: 01 January 2015

Abstract

The purpose of treating seeds chemically is to eradicate their pathogens and/or protect them against soil pathogens, mainly by germination time. However, there is little research on vegetables investigating the effect of this treatment on seed quality. Therefore, this study evaluates the effects of Carboxin + Thiram doses on germination and vigor of three lots of broccoli seeds, as well as on the incidence of fungi in treated seed. The 15 treatments were evaluated in a factorial system (3x5), with the first factor consisting of three lots of 'Avenger' broccoli seeds (lots 82744, 82745 and 82749), and the second factor consisting of five doses (0, 0.04, 0.06, 0.10 and 0.12% of a.i.) of Carboxin + Thiram fungicide (commercial name Vitavax-Thiran). The germination and seed vigor were evaluated, in addition to the presence of pathogens in seeds after treatment (blotter test). All lots showed high levels of germination and vigor. The lot 82749, however, showed higher value in plug test in substrate emergence (99%) than lot 82745 (95%). Regarding the treatment with Carboxin + Thiram, no changes in germination average (98%) and vigor were noticed (average for the first germination count, length, and dry weight of seedling, plug test at 10 days after sowing of 97%, 4.9 cm, 4.0 mg and 96%, respectively), showing that this fungicide, in the evaluated doses, does not affect the quality of broccoli seeds. As to seeds health, the pathogens Alternaria spp. and Fusarium spp. were detected, in addition to saprophytic species such as Penicillium, Aspergillus, Trichoderma, and Rhizopus. The higher incidence of Fusarium spp. was noticed in lot 82744, and the lowest in lot 82749. As to Penicillium spp., lot 82479 was the most contaminated. Regarding other fungi, the general incidence was very low and there was no difference between lots and doses used.

 

Key words: Brassica oleracea, seed treatment, fungicides.