Abstract
Self-thinning in alfalfa, a dynamic process involving the progressive elimination of the weakest plants, was enhanced by Meloidogyne hapla. Alfalfa stand densities decreased exponentially with time and were reduced 62% (P = 0.05) in the presence of M. hapla. As stand densities decreased over time, mean plant weights increased at a rate 2.59 times faster in the absence of M. hapla. In a stepwise multiple regression analysis, 65% of the total variation in yield could be explained by changes in stand density and 85% by average weight of individual stems. Alfalfa yields were suppressed (P = 0.05) by M. hapla, with suppression generally increasing with time and as the nematode population density increased. Yield suppression was attributable primarily to the decline in plant numbers and to suppression in individual plant weights.
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Claims 11
Claim · model-written summary
Meloidogyne hapla enhanced self-thinning in alfalfa.
- Taxon
- alfalfa
Medicago sativae0 - Treatment
- Meloidogyne haplae0
- Interactor
- Meloidogyne hapla
Meloidogyne haplae0pathogen - Outcome
- Self-thinninge0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Self-thinning in alfalfa, a dynamic process involving the progressive elimination of the weakest plants, was enhanced by Meloidogyne hapla”
Claim · model-written summary
Alfalfa stand density decreased exponentially with time.
- Taxon
- AlfalfaMedicago sativae0
- Outcome
- stand densitiese0
- Direction
- decreasede0
- Qualifier
- with timee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Alfalfa stand densities decreased exponentially with time”
Claim · model-written summary
M. hapla reduced alfalfa stand density by 62%.
- Taxon
- AlfalfaMedicago sativae0
- Treatment
- presence of M. haplae0
- Interactor
- M. haplaMeloidogyne haplae0pathogen
- Outcome
- stand densitiese0
- Direction
- reducede0
- Value
- 62%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Alfalfa stand densities decreased exponentially with time and were reduced 62% (P = 0.05) in the presence of M. hapla”
Claim · model-written summary
Mean plant weights rose 2.59 times faster without M. hapla as stand density declined.
- Taxon
- AlfalfaMedicago sativat0
- Interactor
- M. haplaMeloidogyne haplae0pathogen
- Outcome
- mean plant weightse0
- Direction
- increasede0
- Value
- 2.59 timese0
- Comparator
- absence of M. haplae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As stand densities decreased over time, mean plant weights increased at a rate 2.59 times faster in the absence of M. hapla”
t0“Alfalfa”
Claim · model-written summary
Changes in stand density explained 65% of yield variation.
- Taxon
- AlfalfaMedicago sativat0
- Organ / stage
- stande0
- Outcome
- total variation in yielde0
- Value
- 65%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“65% of the total variation in yield could be explained by changes in stand density”
t0“Alfalfa”
Claim · model-written summary
Average individual stem weight explained 85% of yield variation.
- Taxon
- AlfalfaMedicago sativat0
- Organ / stage
- individual stemse0
- Outcome
- total variation in yielde1
- Value
- 85%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“85% by average weight of individual stems”
e1“total variation in yield”
t0“Alfalfa”
Claim · model-written summary
M. hapla suppressed alfalfa yield.
- Taxon
- AlfalfaMedicago sativae0
- Treatment
- M. haplae0
- Interactor
- M. haplaMeloidogyne haplae0pathogen
- Outcome
- yieldse0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Alfalfa yields were suppressed (P = 0.05) by M. hapla”
Claim · model-written summary
Yield suppression generally increased over time.
- Taxon
- AlfalfaMedicago sativae1
- Interactor
- M. haplaMeloidogyne haplae1pathogen
- Outcome
- suppressione0
- Direction
- increasinge0
- Qualifier
- with timee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“suppression generally increasing with time”
e1“Alfalfa yields were suppressed (P = 0.05) by M. hapla”
Claim · model-written summary
Yield suppression generally increased with nematode population density.
- Taxon
- AlfalfaMedicago sativae1
- Interactor
- M. haplaMeloidogyne haplae1pathogen
- Outcome
- suppressione0
- Direction
- increasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“suppression generally increasing with time and as the nematode population density increased”
e1“Alfalfa yields were suppressed (P = 0.05) by M. hapla”
Claim · model-written summary
Yield suppression was attributed mainly to declining plant numbers.
- Taxon
- AlfalfaMedicago sativat0
- Organ / stage
- plante0
- Outcome
- Yield suppressione0
- Qualifier
- decline in plant numberse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield suppression was attributable primarily to the decline in plant numbers”
t0“Alfalfa”
Claim · model-written summary
Yield suppression was also attributed to suppression in individual plant weights.
- Taxon
- AlfalfaMedicago sativat0
- Organ / stage
- individual plante0
- Outcome
- Yield suppressione0
- Qualifier
- suppression in individual plant weightse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield suppression was attributable primarily to the decline in plant numbers and to suppression in individual plant weights”
t0“Alfalfa”
The same questions in other papers
Meloidogyne hapla · yield · Medicago sativa (alfalfa)Results agree
1 paper in the same direction as this paper
- negative
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.