Abstract
SUMMARY Three field experiments were made to determine the effectiveness of small‐plot trials in detecting differences between potato cultivars/clones in their tolerance of damage by potato cyst‐nematodes. A nematicide (aldicarb) was applied at three rates to decrease nematode damage. The largest rate of aldicarb increased tuber yields most but the relationship between yield response and nematicide rate was not linear. The yield increases of the cultivars and clones differed, indicating that they have different degrees of tolerance of potato cyst nematodes. The results were analysed in several ways and the untreated yield as a proportion of the treated provided the best means of expressing and comparing tolerance; but whichever method was used the tolerance rankings of the cultivars and clones were similar. At two sites infested with Globodera rostochiensis , the rankings of the 10 cultivars and clones were similar but at a third site, heavily infested with G. pallida , they were different. Aldicarb decreased the nematode population density after harvest at the G. pallida site but was less effective at the G. rostochiensis sites, which were less heavily infested. Growing resistant or partially resistant potatoes usually prevented nematode increase, and the more resistant cultivars and clones decreased population densities markedly.
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Claims 9
Claim · model-written summary
The highest aldicarb rate increased potato tuber yield most, with a nonlinear dose response.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- largest rate of aldicarbe0
- Outcome
- tuber yieldse0
- Direction
- increasede0
- Qualifier
- was not lineare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The largest rate of aldicarb increased tuber yields most but the relationship between yield response and nematicide rate was not linear.”
t0“potato cultivars”
Claim · model-written summary
Cultivars and clones differed in yield response to aldicarb, indicating differing nematode tolerance.
- Taxon
- potatoSolanum tuberosumt0
- Interactor
- potato cyst nematodese0pest
- Outcome
- yield increasese0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield increases of the cultivars and clones differed, indicating that they have different degrees of tolerance of potato cyst nematodes.”
t0“potato cultivars”
Claim · model-written summary
Untreated yield as a proportion of treated yield was the best tolerance comparison method.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- expressing and comparing tolerancee0
- Direction
- beste0
- Comparator
- treatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the untreated yield as a proportion of the treated provided the best means of expressing and comparing tolerance”
t0“potato cultivars”
Claim · model-written summary
Tolerance rankings were similar across analysis methods.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- tolerance rankingse0
- Direction
- similare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whichever method was used the tolerance rankings of the cultivars and clones were similar”
t0“potato cultivars”
Claim · model-written summary
Cultivar rankings were similar at two G. rostochiensis sites but differed at a G. pallida site.
- Taxon
- potatoSolanum tuberosumt0
- Interactor
- Globodera rostochiensis
Globodera rostochiensise0pest - Outcome
- rankings of the 10 cultivars and clonese0
- Qualifier
- at a third site, heavily infested with G. pallida , they were differente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At two sites infested with Globodera rostochiensis , the rankings of the 10 cultivars and clones were similar but at a third site, heavily infested with G. pallida , they were different.”
t0“potato cultivars”
Claim · model-written summary
Aldicarb decreased postharvest G. pallida population density.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Aldicarbe0
- Interactor
- G. pallidaGlobodera pallidae0pest
- Outcome
- nematode population density after harveste0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aldicarb decreased the nematode population density after harvest at the G. pallida site”
t0“potato cultivars”
Claim · model-written summary
Aldicarb was less effective against nematodes at G. rostochiensis sites.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Aldicarbe1
- Interactor
- G. rostochiensisGlobodera rostochiensise0pest
- Outcome
- less effectivee0
- Direction
- less effectivee0
- Comparator
- G. pallida sitee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was less effective at the G. rostochiensis sites, which were less heavily infested”
e1“Aldicarb decreased the nematode population density after harvest at the G. pallida site but was less effective at the G. rostochiensis sites”
t0“potato cultivars”
Claim · model-written summary
Resistant or partially resistant potatoes usually prevented nematode population increase.
- Taxon
- potatoesSolanum tuberosume0
- Material
- resistant or partially resistant potatoese0
- Outcome
- nematode increasee0
- Direction
- preventede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growing resistant or partially resistant potatoes usually prevented nematode increase”
Claim · model-written summary
More resistant potato cultivars markedly decreased nematode population densities.
- Taxon
- potatoSolanum tuberosumt0
- Material
- more resistant cultivars and clonese0
- Outcome
- population densitiese0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the more resistant cultivars and clones decreased population densities markedly”
t0“potato cultivars”
The same questions in other papers
aldicarb · yield · Solanum tuberosum (potato)Results differ
16 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- positive
- no effect
15 papers more in this group
See all 19 papers →aldicarb · Globodera pallida · Solanum tuberosum (potato)Results agree
3 papers in the same direction as this paper
- positive
- positive
- 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.