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Assessing the diversity of post-harvest pathogens on Swiss beetroot and evaluating the efficacy of pre-harvest treatments on storage diseases

Härri, Tobias (2023) Assessing the diversity of post-harvest pathogens on Swiss beetroot and evaluating the efficacy of pre-harvest treatments on storage diseases. Bachelorarbeit thesis, Swiss Federal Institute of Technology Zurich (ETH); Research Institut of Organic Agriculture FiBL . . [Submitted]

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Summary in the original language of the document

In Switzerland, the consumption of organic vegetables, including organic beetroots, is increasing. Their prolonged storage leads to increased post-harvest losses over time due to rots, resulting in higher imports. To address this issue of storage rots, the present study examined the diversity and frequency of various pathogen species and investigated the effects of different cultivars and treatments. Infected beetroots sorted from storage were used to isolate the fungi. Their DNA was extracted, and species were identified through Sanger sequencing and comparison with the NCBI database. Nineteen different genera of storage pathogens were identified on the beetroots, with Phoma betae being the predominant pathogen, accounting for 55% of the samples. Unexpectedly, the genus Plectosphaerella, not previously described as a beetroot pathogen, was also prominently present. Compared to the previous season, there was a notable increase in the occurrence of Phoma. The three most prevalent pathogen genera Phoma, Plectosphaerella,
and Fusarium remained dominant. The different treatments had only marginal or no positive effect on beetroot health compared to the control group, allowing limited comparisons
between treatments. Differences in the number of diseased beetroots were observed between the two cultivars Betty and Boro, but P. betae was the predominant pathogen in both.
The results imply that a control strategy against P. betae should be prioritized. The three main pathogen genera were predominantly soil-borne, suggesting a more in-depth investigation of the soil.


EPrint Type:Thesis
Thesis Type:Other
Other Type:Bachelorarbeit
Keywords:beetroot, postharvest losses, storage losses, identification, storage pest management, Abacus, FiBL25123
Agrovoc keywords:
Language
Value
URI
English
beetroot
http://aims.fao.org/aos/agrovoc/c_867
English
postharvest losses
http://aims.fao.org/aos/agrovoc/c_6131
English
storage losses
http://aims.fao.org/aos/agrovoc/c_7429
English
identification
http://aims.fao.org/aos/agrovoc/c_3791
English
storage pest management -> stored products pest control
http://aims.fao.org/aos/agrovoc/c_7432
Subjects: Crop husbandry > Production systems > Vegetables
Crop husbandry > Crop health, quality, protection
"Organics" in general > Countries and regions > Switzerland
Crop husbandry > Post harvest management and techniques
Research affiliation: Switzerland > ETHZ - Agrarwissenschaften
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Crops > Anbautechnik
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Crops > Special crops > Vegetables
Related Links:https://www.fibl.org/en/themes/projectdatabase/projectitem/project/1969
Deposited By: Bernasconi, Dr. Alessio
ID Code:53158
Deposited On:19 Apr 2024 12:00
Last Modified:19 Apr 2024 12:00
Document Language:English
Status:Unpublished
Refereed:Submitted for peer-review but not yet accepted

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