Abstract
Cowpea faces a residue-quality trade off during postharvest storage, requiring effective pesticide dissipation without accelerating quality deterioration. This study evaluated the potential of X ray irradiation (0-350 Gy) to simultaneously dissipate chlorfenapyr and azoxystrobin residues, and preserve the postharvest quality of cowpea over 8 days. Pesticide dissipation was dose-dependent, influenced by pesticide properties and matrix effects, with azoxystrobin showing greater apparent degradability than chlorfenapyr. Transformation products were identified, with degradation pathways involving dealkylation, hydroxylation, hydrolysis or ether cleavage, and reductive dehalogenation, while ECOSAR screening indicated most products had potentially lower aquatic toxicity for most products. Irradiated samples also showed lower microbial growth and lipid peroxidation, together with higher antioxidant enzyme activities, phenolics, and flavonoids, suggesting an adaptive stress response. The optimal 300-350 Gy irradiation range balances residue reduction and short-term storage quality, providing a sustainable technical and theoretical foundation for safe postharvest commercial handling of fresh cowpea.
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Claims 8
Claim · model-written summary
Pesticide dissipation on cowpea is dose-dependent under X-ray irradiation from 0 to 350 Gy.
- Taxon
- cowpea
Vigna unguiculatat0 - Treatment
- X ray irradiatione0
- Outcome
- Pesticide dissipatione1
- Direction
- dose-dependente1
- Qualifier
- influenced by pesticide properties and matrix effectse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This study evaluated the potential of X ray irradiation (0-350 Gy) to simultaneously dissipate chlorfenapyr and azoxystrobin residues”
e1“Pesticide dissipation was dose-dependent, influenced by pesticide properties and matrix effects”
t0“preserves postharvest quality of cowpea”
Claim · model-written summary
Azoxystrobin shows greater apparent degradability than chlorfenapyr in cowpea under irradiation.
- Taxon
- cowpeaVigna unguiculatat0
- Compound
- azoxystrobine2
- Outcome
- apparent degradabilitye2
- Direction
- greatere2
- Comparator
- chlorfenapyre2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“with azoxystrobin showing greater apparent degradability than chlorfenapyr”
t0“preserves postharvest quality of cowpea”
Claim · model-written summary
Transformation products of the two pesticides were identified in irradiated cowpea.
- Taxon
- cowpeaVigna unguiculatat0
- Outcome
- Transformation productse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Transformation products were identified”
t0“preserves postharvest quality of cowpea”
Claim · model-written summary
ECOSAR screening indicates that most transformation products have potentially lower aquatic toxicity.
- Taxon
- cowpeaVigna unguiculatat0
- Outcome
- aquatic toxicitye4
- Direction
- lowere4
- Qualifier
- potentiallye4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“ECOSAR screening indicated most products had potentially lower aquatic toxicity for most products”
t0“preserves postharvest quality of cowpea”
Claim · model-written summary
Irradiated cowpea samples show lower microbial growth and lipid peroxidation.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- Irradiated samplese5
- Outcome
- microbial growth and lipid peroxidatione5
- Direction
- lowere5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Irradiated samples also showed lower microbial growth and lipid peroxidation, together with higher antioxidant enzyme activities, phenolics, and flavonoids, suggesting an adaptive stress response”
t0“preserves postharvest quality of cowpea”
Claim · model-written summary
Irradiated cowpea samples show higher antioxidant enzyme activities, phenolics, and flavonoids.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- Irradiated samplese5
- Outcome
- antioxidant enzyme activities, phenolics, and flavonoidse5
- Direction
- highere5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Irradiated samples also showed lower microbial growth and lipid peroxidation, together with higher antioxidant enzyme activities, phenolics, and flavonoids, suggesting an adaptive stress response”
t0“preserves postharvest quality of cowpea”
Claim · model-written summary
The authors interpret the irradiated cowpea response as an adaptive stress response.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- Irradiated samplese5
- Outcome
- adaptive stress responsee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Irradiated samples also showed lower microbial growth and lipid peroxidation, together with higher antioxidant enzyme activities, phenolics, and flavonoids, suggesting an adaptive stress response”
t0“preserves postharvest quality of cowpea”
Claim · model-written summary
The authors recommend an optimal 300-350 Gy irradiation range that balances residue reduction and short-term storage quality.
- Taxon
- cowpeaVigna unguiculatat0
- Outcome
- optimal 300-350 Gy irradiation rangee6
- Qualifier
- balances residue reduction and short-term storage qualitye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“The optimal 300-350 Gy irradiation range balances residue reduction and short-term storage quality”
t0“preserves postharvest quality of cowpea”
The same questions in other papers
radiation · soil: biology · Vigna unguiculata (cowpea)Results agree
1 paper in the same direction as this paper
- positive
radiation · physiology: oxidative · Vigna unguiculata (cowpea)Results agree
1 paper in the same direction as this paper
- positive
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.