Abstract
Damage to alfalfa by Acyrthosiphon kondoi Shinji depended on the number of aphids per stem and the length of infestation. In field studies, first-harvest yields were not significantly reduced at populations of 87 aphids per stem, if they were controlled immediately. However, delaying control as few as 8 days at this infestation level resulted in significant yield reductions. These data expand on previous work and set upper levels for aphid infestation. There was no yield loss in the second or third harvest, indicating that no effects carried over from damage sustained before the first harvest. In greenhouse studies, plants subjected to a heavy aphid infestation produced significantly more leaf dry matter but were significantly shorter than noninfested plants. There was no significant difference in quality, as determined by the percentage of protein and total digestible nutrients, between infested and noninfested plants in either the field or greenhouse study.
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Claims 7
Claim · model-written summary
Aphid damage depended on aphid number per stem and infestation duration.
- Taxon
- alfalfa
Medicago sativae0 - Treatment
- length of infestatione0
- Interactor
- Acyrthosiphon kondoi Shinji
Acyrthosiphon kondoie0pest - Outcome
- Damage to alfalfae0
- Qualifier
- number of aphids per stem and the length of infestatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Damage to alfalfa by Acyrthosiphon kondoi Shinji depended on the number of aphids per stem and the length of infestation.”
Claim · model-written summary
Immediate control at 87 aphids per stem did not significantly reduce first-harvest yield.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- controlled immediatelye0
- Outcome
- first-harvest yieldse0
- Direction
- not significantly reducede0
- Value
- 87 aphids per steme0
- Setting
- field studiese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In field studies, first-harvest yields were not significantly reduced at populations of 87 aphids per stem, if they were controlled immediately.”
t0“Alfalfa”
Claim · model-written summary
An eight-day control delay at this infestation level significantly reduced yield.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- delaying control as few as 8 dayse0
- Outcome
- yielde0
- Direction
- reductionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“delaying control as few as 8 days at this infestation level resulted in significant yield reductions.”
t0“Alfalfa”
Claim · model-written summary
Second- and third-harvest yields showed no carryover loss.
- Taxon
- AlfalfaMedicago sativat0
- Outcome
- yield loss in the second or third harveste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no yield loss in the second or third harvest, indicating that no effects carried over from damage sustained before the first harvest.”
t0“Alfalfa”
Claim · model-written summary
Heavy aphid infestation increased leaf dry matter in the greenhouse.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- heavy aphid infestatione0
- Outcome
- leaf dry mattere0
- Direction
- moree0
- Comparator
- noninfested plantse0
- Setting
- greenhouse studiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In greenhouse studies, plants subjected to a heavy aphid infestation produced significantly more leaf dry matter but were significantly shorter than noninfested plants.”
t0“Alfalfa”
Claim · model-written summary
Heavy aphid infestation made greenhouse plants shorter.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- heavy aphid infestatione0
- Outcome
- shortere0
- Direction
- shortere0
- Comparator
- noninfested plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In greenhouse studies, plants subjected to a heavy aphid infestation produced significantly more leaf dry matter but were significantly shorter than noninfested plants.”
t0“Alfalfa”
Claim · model-written summary
Infested and noninfested plants did not differ significantly in protein percentage or total digestible nutrients.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- infestede0
- Outcome
- percentage of protein and total digestible nutrientse0
- Direction
- no significant differencee0
- Comparator
- noninfested plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no significant difference in quality, as determined by the percentage of protein and total digestible nutrients, between infested and noninfested plants in either the field or greenhouse study.”
t0“Alfalfa”
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See all 18 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.