Abstract
Postharvest diseases pose serious threats to the pome fruit industry worldwide. Grey mould, Mucor rot and blue mould decay on apples, caused by Botrytis cinerea, Mucor piriformis and Penicillium expansum, respectively, are the most economically important postharvest fungal pathogens in apple storage in British Columbia, Canada. The biocontrol capability of Pseudomonas fluorescens isolate 4–6 alone, or in combination with calcium chloride (CaCl2), sodium bicarbonate (SBC) or salicylic acid (SA), against B. cinerea, M. piriformis and P. expansum was evaluated in vitro and on ‘Ambrosia’ apple in commercial cold storage at 1°C. The combination of the antagonist with the chemical additives generally did not enhance the level of control of the pathogens in vitro. The combination of isolate 4–6 with SBC did provide levels of control of B. cinerea, M. piriformis and P. expansum comparable to the commercial fungicide Scholar® on ‘Ambrosia’ apples after 15 weeks in cold storage. The biocontrol capability of P. fluorescens isolates 1–112, 2–28 and 4–6 to control B. cinerea, M. piriformis and P. expansum was also evaluated on ‘Ambrosia’ apples in commercial controlled atmosphere (1.5% CO2 + 1.2% O2) storage at 1°C. All three isolates of P. fluorescens significantly (P < 0.05) inhibited the development of grey mould and blue mould on ‘Ambrosia’ apples after CA storage, and provided levels of control comparable to BioSave® (containing Pseudomonas syringae ESC-10). These results suggest that P. fluorescens has the potential to control common postharvest fungal pathogens during commercial storage, and by combining the antagonist with SBC, decay can be reduced to a commercially acceptable level.
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Claims 6
Claim · model-written summary
Isolate 4–6 combined with SBC gave control of the three pathogens comparable to the fungicide Scholar on apples after 15 weeks in cold storage.
- Taxon
- apples
Malus domesticae5 - Treatment
- isolate 4–6 with SBCe2
- Interactor
- B. cinerea
Botrytis cinereae2pathogen - Outcome
- levels of controle2
- Direction
- comparablee2
- Qualifier
- after 15 weeks in cold storagee2
- Comparator
- Scholare2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The combination of isolate 4–6 with SBC did provide levels of control of B. cinerea, M. piriformis and P. expansum comparable to the commercial fungicide Scholar® on ‘Ambrosia’ apples after 15 weeks in cold storage”
e5“Grey mould, Mucor rot and blue mould decay on apples, caused by Botrytis cinerea, Mucor piriformis and Penicillium expansum”
Claim · model-written summary
All three P. fluorescens isolates significantly inhibited grey mould and blue mould development on apples after CA storage.
- Taxon
- applesMalus domesticae5
- Treatment
- isolates of P. fluorescense3
- Interactor
- Botrytis cinereaBotrytis cinereae5pathogen
- Outcome
- the development of grey mould and blue moulde3
- Direction
- inhibitede3
- Setting
- CA storagee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“All three isolates of P. fluorescens significantly (P < 0.05) inhibited the development of grey mould and blue mould on ‘Ambrosia’ apples after CA storage”
e5“Grey mould, Mucor rot and blue mould decay on apples, caused by Botrytis cinerea, Mucor piriformis and Penicillium expansum”
Claim · model-written summary
The combination of the antagonist with chemical additives generally did not enhance control of the pathogens in vitro.
- Taxon
- applesMalus domesticae5
- Treatment
- the combination of the antagonist with the chemical additivese1
- Interactor
- Botrytis cinereaBotrytis cinereae5pathogen
- Outcome
- level of control of the pathogense1
- Direction
- did not enhancee1
- Setting
- in vitroe1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The combination of the antagonist with the chemical additives generally did not enhance the level of control of the pathogens in vitro”
e5“Grey mould, Mucor rot and blue mould decay on apples, caused by Botrytis cinerea, Mucor piriformis and Penicillium expansum”
Claim · model-written summary
Combining the antagonist with SBC can reduce decay to a commercially acceptable level.
- Taxon
- applesMalus domesticae5
- Treatment
- combining the antagonist with SBCe4
- Outcome
- decaye4
- Direction
- reducede4
- Qualifier
- commercially acceptable levele4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“by combining the antagonist with SBC, decay can be reduced to a commercially acceptable level”
e5“Grey mould, Mucor rot and blue mould decay on apples, caused by Botrytis cinerea, Mucor piriformis and Penicillium expansum”
Claim · model-written summary
Isolates 1–112, 2–28 and 4–6 gave control of grey and blue mould comparable to BioSave on apples in controlled-atmosphere storage.
- Taxon
- applesMalus domesticae3
- Treatment
- All three isolates of P. fluorescense3
- Interactor
- Pseudomonas syringae
Pseudomonas syringaee3biocontrol_agent - Outcome
- levels of controle3
- Direction
- comparablee3
- Comparator
- BioSavee3
- Setting
- CA storagee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“All three isolates of P. fluorescens significantly (P < 0.05) inhibited the development of grey mould and blue mould on ‘Ambrosia’ apples after CA storage, and provided levels of control comparable to BioSave® (containing Pseudomonas syringae ESC-10)”
Claim · model-written summary
P. fluorescens has the potential to control common postharvest fungal pathogens during commercial storage.
- Taxon
- applesMalus domesticae5
- Treatment
- P. fluorescense6
- Outcome
- control common postharvest fungal pathogense6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“These results suggest that P. fluorescens has the potential to control common postharvest fungal pathogens during commercial storage”
e5“Grey mould, Mucor rot and blue mould decay on apples, caused by Botrytis cinerea, Mucor piriformis and Penicillium expansum”
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- positive
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biocontrol · Botrytis cinerea · Malus domestica (apple)Positive and negative results
2 in the opposite direction
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15 papers in the same direction as this paper
- positive
- positive
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12 papers more in this group
See all 16 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.