Abstract
In field trials at Pukekohe the effects were assessed of increased seed depth, re‐moulding, pre‐harvest defoliation, and delayed harvest on infestation of potato tubers by Phthorimaea operculella (Zeller). Tuber damage was halved by planting seed 25 cm below the ridge apex rather than the standard 18 cm. Re‐moulding at flowering reduced tuber damage in one trial, but was ineffective in another. Mechanical defoliation of infested foliage before harvest was associated with increased tuber infestation, which was evident only at second grading 12 days after harvest. Chemical defoliation showed a direct correlation between foliar and re‐graded tuber infestation levels, but the tuber infestation level was not significantly greater than control. A 2–4 weeks' delay in harvest resulted in increased levels of tuber infestation, indicating that adults are attracted to, and will oviposit in, potato crops in the absence of foliage.
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Claims 8
Claim · model-written summary
Planting seed 25 cm below the ridge apex halved potato tuber damage compared with 18 cm.
- Taxon
- potato crops
Solanum tuberosumt0 - Treatment
- planting seed 25 cm below the ridge apexe0
- Interactor
- potato tuber motht0pest
- Outcome
- Tuber damagee0
- Direction
- halvede0
- Value
- 25 cme0
- Comparator
- the standard 18 cme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato crops by the potato tuber moth”
e0“Tuber damage was halved by planting seed 25 cm below the ridge apex rather than the standard 18 cm.”
Claim · model-written summary
Re-moulding at flowering reduced tuber damage in one trial.
- Taxon
- potato cropsSolanum tuberosumt0
- Treatment
- Re‐moulding at floweringe0
- Interactor
- potato tuber motht0pest
- Outcome
- tuber damagee0
- Direction
- reducede0
- Qualifier
- one triale0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato crops by the potato tuber moth”
e0“Re‐moulding at flowering reduced tuber damage in one trial”
Claim · model-written summary
Re-moulding at flowering was ineffective in another trial.
- Taxon
- potato cropsSolanum tuberosumt0
- Treatment
- Re‐moulding at floweringe0
- Interactor
- potato tuber motht0pest
- Outcome
- tuber damagee0
- Direction
- ineffectivee0
- Qualifier
- anothere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato crops by the potato tuber moth”
e0“Re‐moulding at flowering reduced tuber damage in one trial, but was ineffective in another.”
Claim · model-written summary
Mechanical defoliation of infested foliage before harvest was associated with increased tuber infestation at second grading 12 days after harvest.
- Taxon
- potato cropsSolanum tuberosumt0
- Treatment
- Mechanical defoliation of infested foliage before harveste0
- Interactor
- potato tuber motht0pest
- Outcome
- tuber infestatione0
- Direction
- increasede0
- Qualifier
- only at second grading 12 days after harveste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato crops by the potato tuber moth”
e0“Mechanical defoliation of infested foliage before harvest was associated with increased tuber infestation, which was evident only at second grading 12 days after harvest.”
Claim · model-written summary
Foliar and re-graded tuber infestation were directly correlated after chemical defoliation.
- Taxon
- potato cropsSolanum tuberosumt0
- Treatment
- Chemical defoliatione0
- Interactor
- potato tuber motht0pest
- Outcome
- foliar and re‐graded tuber infestation levelse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato crops by the potato tuber moth”
e0“Chemical defoliation showed a direct correlation between foliar and re‐graded tuber infestation levels”
Claim · model-written summary
Tuber infestation after chemical defoliation was not significantly greater than control.
- Taxon
- potato cropsSolanum tuberosumt0
- Treatment
- Chemical defoliatione0
- Interactor
- potato tuber motht0pest
- Outcome
- tuber infestation levele0
- Direction
- not significantly greatere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato crops by the potato tuber moth”
e0“Chemical defoliation showed a direct correlation between foliar and re‐graded tuber infestation levels, but the tuber infestation level was not significantly greater than control.”
Claim · model-written summary
Delaying harvest by 2–4 weeks increased tuber infestation.
- Taxon
- potato cropsSolanum tuberosumt0
- Treatment
- 2–4 weeks' delay in harveste0
- Interactor
- potato tuber motht0pest
- Outcome
- tuber infestatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato crops by the potato tuber moth”
e0“A 2–4 weeks' delay in harvest resulted in increased levels of tuber infestation”
Claim · model-written summary
Adults are attracted to and oviposit in potato crops without foliage.
- Taxon
- potato cropsSolanum tuberosumt0e0
- Interactor
- potato tuber motht0pest
- Outcome
- attracted to, and will oviposit in, potato cropse0
- Qualifier
- in the absence of foliagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato crops by the potato tuber moth”
e0“adults are attracted to, and will oviposit in, potato crops in the absence of foliage”
The same questions in other papers
pruning · pest · Solanum tuberosum (potato)Results agree
1 paper in the same direction as this paper
- no effect
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.