The effects of storage duration, temperature and cultivar on the severity of garlic clove rot caused by Fusarium proliferatum.

Palmero Llamas, Daniel and Galvez Patón, Laura and García Díaz, M. and Gil Serna, J. and Benito Saez, Santiago (2013). The effects of storage duration, temperature and cultivar on the severity of garlic clove rot caused by Fusarium proliferatum.. "Postharvest Biology and Technology", v. 78 ; pp. 34-39. ISSN 0925-5214.

Description

Title: The effects of storage duration, temperature and cultivar on the severity of garlic clove rot caused by Fusarium proliferatum.
Author/s:
  • Palmero Llamas, Daniel
  • Galvez Patón, Laura
  • García Díaz, M.
  • Gil Serna, J.
  • Benito Saez, Santiago
Item Type: Article
Título de Revista/Publicación: Postharvest Biology and Technology
Date: April 2013
ISSN: 0925-5214
Volume: 78
Subjects:
Faculty: E.U.I.T. Agrícolas (UPM)
Department: Producción Vegetal: Botánica y Protección Vegetal [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Diseases that affect garlic during storage can lead to severe economic losses for farmers worldwide. One causal agent of clove rot is Fusarium proliferatum. Here, the progress of clove rot caused by F. proliferatum and its dependence on different storage conditions and cultivar type were studied. The effect of temperature on mycelial growth, conidial viability, and fungal survival during garlic commercial storage was documented. Samples of 50 bulbs from a randomized field trial with three different clonal generations for purple garlic (F3, F4 and F5) and the F4 clonal generation for white garlic were labeled and stored for two months (short-term storage). In addition, another sample of the F5 clonal generation of purple garlic was stored for 6 months after harvest (long-term storage). The presence of the pathogen and the percentage of symptomatic cloves were evaluated. A notable difference in the rot severity index (RSI) of different garlic varieties was observed. In all studied cases, clove rot increased with storage time at 20 ◦ C, and the white garlic variety had a higher index of rot severity after two months of storage. Additionally, there were clear differences between the growth rates of F. proliferatum isolates. Studies conducted on the temperature responses of the pathogen propagules showed that expo- sure for at least 20 min at 50 ◦ C was highly effective in significantly reducing the viability of fungal conidia. Pathogenicity studies showed that the fungus is pathogenic in all commercial varieties. However, there were significant differences in varietal susceptibility between Chinese and white garlic type cultivars (81.84 ± 16.44% and 87.5 ± 23.19% symptomatic cloves, respectively) and purple cultivars (49.06 ± 13.42% symptomatic cloves)

More information

Item ID: 19112
DC Identifier: http://oa.upm.es/19112/
OAI Identifier: oai:oa.upm.es:19112
Deposited by: Memoria Investigacion
Deposited on: 12 Sep 2013 11:32
Last Modified: 01 May 2015 22:56
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