Abstract
The oviposition deterrent effect of water extract of Spodoptera littoralis and Agrotis ipsilon larval frass on Phthorimaea operculella adult females was studied using two types of larval food “Natural host and Semi-artificial diet” under laboratory and storage simulation (semi-field) conditions. Extracted frass of fed larvae on semi-artificial diet showed complete oviposition deterrent effect at treatments with 4th, 5th and 6th instars of S. littoralis, also at treatments with 1st–3rd and 6th instars of A. ipsilon, while the same effect was observed when the larvae fed on castor oil leaves as a natural host only at treatment with frass extract of A. ipsilon 6th instar larvae. Presence of low amounts of phenols and flavonoids in water extract of A. ipsilon larval frass resulted in relatively more effect as oviposition deterrent to fertile adult females on treated oviposition sites, while the opposite effect was obtained in S. littoralis larval frass experiments. At semi-field experiments, the percentage reduction of laid eggs reached 100% after two days at treatments with frass extracts of 4th and 5th S. littoralis larval instars and A. ipsilon 6th instar larvae fed on semi-artificial diet and/or castor oil leaves. Percentage reduction of laid eggs for untreated sacks reached 93.24 and 48.95% after 2 and 30 days, respectively, when placed between treated sacks, in comparison with the mean number of laid eggs for isolated control.
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Claims 7
Claim · model-written summary
Frass extract from S. littoralis larvae fed a semi-artificial diet (4th, 5th and 6th instars) gave a complete oviposition deterrent effect against P. operculella.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- Extracted frass of fed larvae on semi-artificial diete1
- Interactor
- Phthorimaea operculella
Phthorimaea operculellat0pest - Outcome
- oviposition deterrent effecte1
- Direction
- completee1
- Qualifier
- 4th, 5th and 6th instars of S. littoralise1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato crop againstPhthorimaea operculella”
e1“Extracted frass of fed larvae on semi-artificial diet showed complete oviposition deterrent effect at treatments with 4th, 5th and 6th instars of S. littoralis”
Claim · model-written summary
Frass extract from A. ipsilon larvae fed a semi-artificial diet (1st-3rd and 6th instars) gave a complete oviposition deterrent effect against P. operculella.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Extracted frass of fed larvae on semi-artificial diete1
- Interactor
- Phthorimaea operculellaPhthorimaea operculellat0pest
- Outcome
- oviposition deterrent effecte1
- Direction
- completee1
- Qualifier
- 1st–3rd and 6th instars of A. ipsilone1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato crop againstPhthorimaea operculella”
e1“Extracted frass of fed larvae on semi-artificial diet showed complete oviposition deterrent effect at treatments with 4th, 5th and 6th instars of S. littoralis, also at treatments with 1st–3rd and 6th instars of A. ipsilon”
Claim · model-written summary
When larvae fed on castor oil leaves, only frass extract of A. ipsilon 6th instar larvae gave the same complete oviposition deterrent effect.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- frass extract of A. ipsilon 6th instar larvaee2
- Interactor
- Phthorimaea operculellaPhthorimaea operculellat0pest
- Outcome
- oviposition deterrent effecte1
- Direction
- completee1
- Qualifier
- castor oil leaves as a natural hoste2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato crop againstPhthorimaea operculella”
e1“complete oviposition deterrent effect”
e2“while the same effect was observed when the larvae fed on castor oil leaves as a natural host only at treatment with frass extract of A. ipsilon 6th instar larvae”
Claim · model-written summary
Low amounts of phenols and flavonoids in the water extract of A. ipsilon larval frass resulted in relatively more oviposition deterrent effect on fertile females.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- water extract of A. ipsilon larval frasse1
- Interactor
- Phthorimaea operculellaPhthorimaea operculellat0pest
- Compound
- phenols and flavonoidse1
- Outcome
- oviposition deterrente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato crop againstPhthorimaea operculella”
e1“Presence of low amounts of phenols and flavonoids in water extract of A. ipsilon larval frass resulted in relatively more effect as oviposition deterrent to fertile adult females on treated oviposition sites”
Claim · model-written summary
In semi-field experiments the reduction of laid eggs reached 100 percent after two days with frass extracts of 4th and 5th instar S. littoralis and 6th instar A. ipsilon larvae.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- frass extracts of 4th and 5th S. littoralis larval instars and A. ipsilon 6th instar larvaee1
- Interactor
- Phthorimaea operculellaPhthorimaea operculellat0pest
- Outcome
- percentage reduction of laid eggse1
- Direction
- reductione1
- Value
- 100%e1
- Setting
- semi-fielde1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato crop againstPhthorimaea operculella”
e1“At semi-field experiments, the percentage reduction of laid eggs reached 100% after two days at treatments with frass extracts of 4th and 5th S. littoralis larval instars and A. ipsilon 6th instar larvae fed on semi-artificial diet and/or castor oil leaves”
Claim · model-written summary
Laid eggs were reduced by 93.24 percent after 2 days in untreated sacks placed between treated sacks, relative to isolated control.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- placed between treated sackse1
- Interactor
- Phthorimaea operculellaPhthorimaea operculellat0pest
- Outcome
- Percentage reduction of laid eggse1
- Direction
- reductione1
- Value
- 93.24e1
- Qualifier
- after 2 and 30 dayse1
- Comparator
- isolated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato crop againstPhthorimaea operculella”
e1“Percentage reduction of laid eggs for untreated sacks reached 93.24 and 48.95% after 2 and 30 days, respectively, when placed between treated sacks, in comparison with the mean number of laid eggs for isolated control”
Claim · model-written summary
Laid eggs were reduced by 48.95 percent after 30 days in untreated sacks placed between treated sacks, relative to isolated control.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- placed between treated sackse1
- Interactor
- Phthorimaea operculellaPhthorimaea operculellat0pest
- Outcome
- Percentage reduction of laid eggse1
- Direction
- reductione1
- Value
- 48.95%e1
- Qualifier
- after 2 and 30 dayse1
- Comparator
- isolated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato crop againstPhthorimaea operculella”
e1“Percentage reduction of laid eggs for untreated sacks reached 93.24 and 48.95% after 2 and 30 days, respectively, when placed between treated sacks, in comparison with the mean number of laid eggs for isolated control”
The same questions in other papers
botanical · Phthorimaea operculella · Solanum tuberosum (potato)Positive and negative results
17 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
15 papers more in this group
See all 19 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.