Abstract
Larval feeding by Hypera postica (Gyllenhal) on first cutting alfalfa reduced both the yield and quality of the crop. A linear reduction in yield was observed over most of the population range. The amount of loss attributable to a single larva and the smallest larval density (SLD) that produced the maximum yield reduction was dependent upon the size of alfalfa plant during the time of attack. Larger plants were able to withstand larger larval densities. Associated with this yield change was a significant increase in yield at larval densities equivalent to 15–22% of the SLD value. A reduction in stem elongation occurred at a density of 30–100% of the SLD value. Quality (crude protein and in-vitro dry matter digestibility) losses were observed over most of the range with a significant increase occurring at a larval density equivalent to 25–35% of the SLD value.
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Claims 8
Claim · model-written summary
Larval feeding by Hypera postica reduced both the yield and quality of first cutting alfalfa.
- Taxon
- alfalfa
Medicago sativae0 - Treatment
- Larval feedinge0
- Interactor
- Hypera postica
Hypera posticae0pest - Outcome
- yield and qualitye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Larval feeding by Hypera postica (Gyllenhal) on first cutting alfalfa reduced both the yield and quality of the crop”
t0“First Cutting Alfalfa”
Claim · model-written summary
Yield declined linearly over most of the larval population range of alfalfa weevil.
- Taxon
- alfalfaMedicago sativae0
- Interactor
- Hypera posticaHypera posticae0pest
- Outcome
- yielde1
- Direction
- linear reductione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“A linear reduction in yield was observed over most of the population range”
e0“Larval feeding by Hypera postica (Gyllenhal) on first cutting alfalfa reduced both the yield and quality of the crop”
Claim · model-written summary
The loss per larva and the smallest larval density causing maximum yield reduction depend on alfalfa plant size at attack.
- Taxon
- alfalfaMedicago sativae2
- Outcome
- The amount of loss attributable to a single larva and the smallest larval density (SLD)e2
- Qualifier
- dependent upon the size of alfalfa plant during the time of attacke2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The amount of loss attributable to a single larva and the smallest larval density (SLD) that produced the maximum yield reduction was dependent upon the size of alfalfa plant during the time of attack”
Claim · model-written summary
Larger alfalfa plants withstand larger larval densities.
- Taxon
- AlfalfaMedicago sativat0
- Interactor
- Hypera posticaHypera posticae0pest
- Outcome
- withstand larger larval densitiese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Larger plants were able to withstand larger larval densities”
t0“First Cutting Alfalfa”
e0“Larval feeding by Hypera postica (Gyllenhal) on first cutting alfalfa reduced both the yield and quality of the crop”
Claim · model-written summary
Yield increased significantly at larval densities equivalent to 15–22% of the SLD value.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- larval densities equivalent to 15–22% of the SLD valuee4
- Outcome
- yielde4
- Direction
- increasee4
- Value
- 15–22%e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Associated with this yield change was a significant increase in yield at larval densities equivalent to 15–22% of the SLD value”
t0“First Cutting Alfalfa”
Claim · model-written summary
Stem elongation was reduced at a larval density of 30–100% of the SLD value.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- density of 30–100% of the SLD valuee5
- Outcome
- stem elongatione5
- Direction
- reductione5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“A reduction in stem elongation occurred at a density of 30–100% of the SLD value”
t0“First Cutting Alfalfa”
Claim · model-written summary
Quality (crude protein and in-vitro dry matter digestibility) decreased over most of the larval density range.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- larval densitye6
- Outcome
- crude protein and in-vitro dry matter digestibilitye6
- Direction
- decreaseinferrede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Quality (crude protein and in-vitro dry matter digestibility) losses were observed over most of the range with a significant increase occurring at a larval density equivalent to 25–35% of the SLD value”
t0“First Cutting Alfalfa”
Claim · model-written summary
Quality losses increased significantly at a larval density equivalent to 25–35% of the SLD value.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- larval density equivalent to 25–35% of the SLD valuee6
- Outcome
- lossese6
- Direction
- increasee6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Quality (crude protein and in-vitro dry matter digestibility) losses were observed over most of the range with a significant increase occurring at a larval density equivalent to 25–35% of the SLD value”
t0“First Cutting Alfalfa”
The same questions in other papers
infection · Hypera postica · Medicago sativa (alfalfa)Results agree
3 papers in the same direction as this paper
- negative
- negative
- 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.