Abstract
Restrictions on pesticide usage and the occurrence of fungicide resistant strains of postharvest pathogens have necessitated research for alternative methods of disease control. Psuedomonas cepacia was tested for control of Botrytis fruit rot in strawberry. Results of field applications of P . cepacia were variable. A compound isolated from P . cepacia , identified as pyrrolnitrin, was as effective as Benlate/captan (2,000 ppm) sprays in field applications. Postharvest pyrrolnitrin (100 ppm) dip inhibited growth of pathogens for three days at room temperature. A pyrrolnitrin dip followed by storage at 1°C for five days extended the shelf-life for another five days. Preharvest pyrrolnitrin sprays to `Bristol' black raspberry delayed rot development by 4 to 5 days. Captan (2,000 ppm) treatment provided no protection. In vitro tests showed that B . cinerea isolated from the fruit had developed resistance to captan. These results suggest that the use of a naturally-produced compound might afford another opportunity to reduce postharvest rots without the use of synthetic fungicides.
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Claims 8
Claim · model-written summary
Field application of Pseudomonas cepacia had variable control of Botrytis fruit rot in strawberry.
- Taxon
- strawberry
_single2.jpg?width=60)
Fragaria ×ananassae0 - Treatment
- P . cepaciae0
- Second interactor
- Psuedomonas cepaciae0biocontrol_agent
- Outcome
- Botrytis fruit rote0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_single2.jpg?width=500)
Verbatim
e0“Psuedomonas cepacia was tested for control of Botrytis fruit rot in strawberry. Results of field applications of P . cepacia were variable”
Claim · model-written summary
Pyrrolnitrin was as effective as Benlate/captan sprays in field applications.
- Taxon
- strawberryFragaria ×ananassae1
- Treatment
- pyrrolnitrine0
- Outcome
- as effectivee0
- Direction
- as effectivee0
- Qualifier
- 2,000 ppme0
- Comparator
- Benlate/captane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A compound isolated from P . cepacia , identified as pyrrolnitrin, was as effective as Benlate/captan (2,000 ppm) sprays in field applications”
e1“Botrytis fruit rot in strawberry”
Claim · model-written summary
Postharvest 100 ppm pyrrolnitrin dip inhibited pathogen growth for three days at room temperature.
- Taxon
- strawberryFragaria ×ananassae1
- Treatment
- pyrrolnitrin (100 ppm) dipe0
- Outcome
- growth of pathogense0
- Direction
- inhibitede0
- Value
- three dayse0
- Setting
- room temperaturee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Postharvest pyrrolnitrin (100 ppm) dip inhibited growth of pathogens for three days at room temperature”
e1“Botrytis fruit rot in strawberry”
Claim · model-written summary
A pyrrolnitrin dip plus cold storage extended fruit shelf life another five days.
- Taxon
- strawberryFragaria ×ananassae1
- Treatment
- A pyrrolnitrin dip followed by storage at 1°C for five dayse0
- Outcome
- shelf-lifee0
- Direction
- extendede0
- Value
- another five dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A pyrrolnitrin dip followed by storage at 1°C for five days extended the shelf-life for another five days”
e1“Botrytis fruit rot in strawberry”
Claim · model-written summary
Preharvest pyrrolnitrin sprays delayed rot in Bristol black raspberry by 4 to 5 days.
- Taxon
- black raspberry
Rubus occidentalise0 - Material
- Bristole0
- Treatment
- Preharvest pyrrolnitrin sprayse0
- Outcome
- rot developmente0
- Direction
- delayede0
- Value
- 4 to 5 dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Preharvest pyrrolnitrin sprays to `Bristol' black raspberry delayed rot development by 4 to 5 days”
Claim · model-written summary
Captan treatment provided no rot protection.
- Taxon
- black raspberryRubus occidentalise1
- Treatment
- Captan (2,000 ppm) treatmente0
- Outcome
- protectione0
- Direction
- no protectione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Captan (2,000 ppm) treatment provided no protection”
e1“black raspberry”
Claim · model-written summary
Fruit-isolated Botrytis cinerea was resistant to captan in vitro.
- Taxon
- black raspberryRubus occidentalise1
- Interactor
- B . cinerea
Botrytis cinereae0pathogen - Outcome
- resistance to captane0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“B . cinerea isolated from the fruit had developed resistance to captan”
e1“black raspberry”
Claim · model-written summary
Authors suggest naturally produced compounds could reduce postharvest rots without synthetic fungicides.
- Taxon
- strawberryFragaria ×ananassae1
- Outcome
- reduce postharvest rots without the use of synthetic fungicidese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the use of a naturally-produced compound might afford another opportunity to reduce postharvest rots without the use of synthetic fungicides”
e1“strawberry”
The same questions in other papers
storage · quality: postharvest · Fragaria x ananassa (strawberry)Positive and negative results
116 papers in the same direction as this paper · 4 in the opposite direction
- negative
- no effect
- negative
117 papers more in this group
See all 121 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.