Abstract
Feeding by Acyrthosiphon pisum (Harris) (Homoptera: Aphididae) on young pea plants, Pisum Sativum (L.) var. ‘Alaska,’ reduced the relative growth rate and efficiency of production of new tissue relative to the amount of leaf area by as much as 118%. These changes were proportional to the number of aphids and length of infestation period and occurred because of reductions in leaf surface area up to 83% and loss of pholosynlhate which aphids extracted. Reductions were only one-fifth to two-thirds as large when infestations were delayed for 5 days. Total leaf area of the plants relative to their weights was not decreased.
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Claims 6
Claim · model-written summary
Aphid feeding reduced pea relative growth rate by as much as 118%.
- Taxon
- Pisum Sativum
Lathyrus oleraceuse0 - Material
- ‘Alaska,’e0
- Treatment
- Feeding by Acyrthosiphon pisume0
- Interactor
- Acyrthosiphon pisum
-PLoS.jpg?width=60)
Acyrthosiphon pisume0pest - Outcome
- relative growth ratee0
- Direction
- reducede0
- Value
- 118%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
-PLoS.jpg?width=500)
Verbatim
e0“Feeding by Acyrthosiphon pisum (Harris) (Homoptera: Aphididae) on young pea plants, Pisum Sativum (L.) var. ‘Alaska,’ reduced the relative growth rate and efficiency of production of new tissue relative to the amount of leaf area by as much as 118%.”
Claim · model-written summary
Aphid feeding reduced efficiency of new tissue production relative to leaf area by as much as 118%.
- Taxon
- Pisum SativumLathyrus oleraceuse0
- Treatment
- Feeding by Acyrthosiphon pisume0
- Interactor
- Acyrthosiphon pisumAcyrthosiphon pisume0pest
- Outcome
- efficiency of production of new tissue relative to the amount of leaf areae0
- Direction
- reducede0
- Value
- 118%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Feeding by Acyrthosiphon pisum (Harris) (Homoptera: Aphididae) on young pea plants, Pisum Sativum (L.) var. ‘Alaska,’ reduced the relative growth rate and efficiency of production of new tissue relative to the amount of leaf area by as much as 118%.”
Claim · model-written summary
The growth changes were proportional to aphid number and infestation duration.
- Interactor
- aphidsAphidomorphae0pest
- Outcome
- These changese0
- Direction
- proportionale0
Not reportedTaxon
Verbatim
e0“These changes were proportional to the number of aphids and length of infestation period”
Claim · model-written summary
Aphid feeding reduced pea leaf surface area by up to 83%.
- Interactor
- aphidsAphidomorphae0pest
- Outcome
- leaf surface areae0
- Direction
- reductionse0
- Value
- 83%e0
Not reportedTaxonTreatmentComparator
Verbatim
e0“reductions in leaf surface area up to 83% and loss of pholosynlhate which aphids extracted”
Claim · model-written summary
Delaying infestation for five days made reductions one fifth to two thirds as large.
- Treatment
- infestations were delayed for 5 dayse0
- Outcome
- Reductionse0
- Direction
- only one-fifth to two-thirds as largee0
Not reportedTaxonComparator
Verbatim
e0“Reductions were only one-fifth to two-thirds as large when infestations were delayed for 5 days.”
Claim · model-written summary
Total leaf area relative to plant weight was not decreased.
Not reportedTaxon
Verbatim
e0“Total leaf area of the plants relative to their weights was not decreased.”
The same questions in other papers
Acyrthosiphon pisum · yield · Lathyrus oleraceus (pea)Results agree
2 papers in the same direction as this paper
- no effect
- negative
infection · growth · Lathyrus oleraceus (pea)Results agree
5 papers in the same direction as this paper
- negative
- negative
- negative
2 papers more in this group
See all 6 papers →infection · yield · Lathyrus oleraceus (pea)Results agree
8 papers in the same direction as this paper
- negative
- no effect
- negative
5 papers more in this group
See all 9 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.