Abstract
The onion bulb rot which is caused by a number of fungi pathogens is considered one of the most important factors leading to high postharvest loss in onions. Studies were conducted to determine the incidence of onion bulb rot, identify the associated fungi and evaluate the impact of storage containers on the incidence of the disease. Thirty (30) rotten onion bulbs var. ‘Bawku Red’ samples were collected from two markets in Tamale and studied in the Spanish laboratory, Faculty of Agriculture, University for Development Studies, Nyankpala. The results showed that the onion bulb rot was caused by five fungi species including Aspergillus niger, Aspergillus flavus, Penicillium sp., Rhizopus stolonifer and Fusarium oxysporum. A. niger had the highest percentage occurrence of 30.66% and 25.66% for the Tamale Central and Aboabo markets, respectively. The pathogenicity test conducted showed that A. niger and R. stolonifer were the most pathogenic species. Generally, black mould (A. niger), blue mould (Penicillium sp.), soft rot (R. stolonifer) and basal plate rot (F. oxysporum) were the commonest diseases associated with onion bulbs in the Tamale markets. The most encountered disease was black mould while the least was soft rot. The incidence of onion bulb rot was significantly (P < 0.05) higher in onions that were stored in sacks compared with those stored in baskets and pans. In order to reduce storage rot of onion bulbs, there is the need to encourage the use of pans and baskets for storing onion bulbs in the markets.
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Claims 7
Claim · model-written summary
Five fungal species caused onion bulb rot, including Aspergillus niger
- Taxon
- onion
Allium cepat0 - Interactor
- Aspergillus niger
Aspergillus nigere1pathogen - Outcome
- five fungi speciese1
- Qualifier
- Aspergillus flavus, Penicillium sp., Rhizopus stolonifer and Fusarium oxysporume1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fungi associated with onion (Allium cepa L.) bulb rot”
e1“the onion bulb rot was caused by five fungi species including Aspergillus niger, Aspergillus flavus, Penicillium sp., Rhizopus stolonifer and Fusarium oxysporum”
Claim · model-written summary
Aspergillus niger had 30.66% occurrence in Tamale Central market
- Taxon
- onionAllium cepat0
- Interactor
- A. nigerAspergillus nigere2pathogen
- Outcome
- percentage occurrencee2
- Value
- 30.66%e2
- Setting
- Tamale Centrale2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fungi associated with onion (Allium cepa L.) bulb rot”
e2“A. niger had the highest percentage occurrence of 30.66% and 25.66% for the Tamale Central and Aboabo markets, respectively”
Claim · model-written summary
Aspergillus niger had 25.66% occurrence in Aboabo market
- Taxon
- onionAllium cepat0
- Interactor
- A. nigerAspergillus nigere2pathogen
- Outcome
- percentage occurrencee2
- Value
- 25.66%e2
- Setting
- Aboabo marketse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fungi associated with onion (Allium cepa L.) bulb rot”
e2“A. niger had the highest percentage occurrence of 30.66% and 25.66% for the Tamale Central and Aboabo markets, respectively”
Claim · model-written summary
Aspergillus niger and Rhizopus stolonifer were the most pathogenic onion fungi
- Taxon
- onionAllium cepat0
- Interactor
- A. nigerAspergillus nigere3pathogen
- Second interactor
- R. stolonifer
Rhizopus stolonifere3pathogen - Outcome
- pathogenicitye3
- Qualifier
- the most pathogenic speciese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fungi associated with onion (Allium cepa L.) bulb rot”
e3“The pathogenicity test conducted showed that A. niger and R. stolonifer were the most pathogenic species”
Claim · model-written summary
Black mould (Aspergillus niger) was the most encountered onion disease and soft rot the least
- Taxon
- onionAllium cepat0
- Interactor
- A. nigerAspergillus nigere5pathogen
- Outcome
- most encountered diseasee4
- Qualifier
- the least was soft rote4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fungi associated with onion (Allium cepa L.) bulb rot”
e4“The most encountered disease was black mould while the least was soft rot”
e5“black mould (A. niger)”
Claim · model-written summary
Onion bulb rot incidence was higher in onions stored in sacks than in baskets and pans
- Taxon
- onionAllium cepat0
- Treatment
- stored in sackse6
- Outcome
- incidence of onion bulb rote6
- Direction
- highere6
- Qualifier
- P < 0.05e6
- Comparator
- baskets and panse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fungi associated with onion (Allium cepa L.) bulb rot”
e6“The incidence of onion bulb rot was significantly (P < 0.05) higher in onions that were stored in sacks compared with those stored in baskets and pans”
Claim · model-written summary
Pans and baskets should be encouraged for storing onion bulbs in markets
- Taxon
- onionAllium cepat0
- Outcome
- use of pans and baskets for storing onion bulbse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fungi associated with onion (Allium cepa L.) bulb rot”
e7“there is the need to encourage the use of pans and baskets for storing onion bulbs in the markets”
The same questions in other papers
storage · disease · Allium cepa (onion)Positive and negative results
2 papers in the same direction as this paper · 7 in the opposite direction
- positive
- positive
- positive
6 papers more in this group
See all 10 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.