Abstract
The growth habit and yield response of alfalfa to the feeding of Hypera postica (Gyllenhal) larvae was measured in growth chambers at densities of 2–16 larvae/stem. Yield response of alfalfa to larval feeding was a proportional reduction of leaf and stem weight, and was more pronounced at 25°–22°C day-night temperature than at 16°–13°C. At the higher temperatures with densities of 8 and 16 larvae per stem, reductions in yield were 53 and 64%, while the rate of leaf node development was reduced 65 and 78%. Artificial defoliation did not cause a comparable reduction in the rate of leaf node development.
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Claims 5
Claim · model-written summary
At higher temperatures, larval densities of 8 and 16 per stem reduced alfalfa yield by 53 and 64%.
- Taxon
- alfalfa
Medicago sativae0 - Treatment
- densities of 8 and 16 larvae per steme2
- Interactor
- Hypera postica (Gyllenhal)
Hypera posticae0pest - Outcome
- yielde2
- Direction
- reductionse2
- Value
- 53 and 64%e2
- Setting
- growth chamberse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The growth habit and yield response of alfalfa to the feeding of Hypera postica (Gyllenhal) larvae was measured in growth chambers at densities of 2–16 larvae/stem”
e2“At the higher temperatures with densities of 8 and 16 larvae per stem, reductions in yield were 53 and 64%, while the rate of leaf node development was reduced 65 and 78%”
Claim · model-written summary
At higher temperatures, larval densities of 8 and 16 per stem reduced the rate of alfalfa leaf node development by 65 and 78%.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- densities of 8 and 16 larvae per steme2
- Interactor
- Hypera postica (Gyllenhal)Hypera posticae0pest
- Outcome
- rate of leaf node developmente2
- Direction
- reducede2
- Value
- 65 and 78%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The growth habit and yield response of alfalfa to the feeding of Hypera postica (Gyllenhal) larvae was measured in growth chambers at densities of 2–16 larvae/stem”
e2“At the higher temperatures with densities of 8 and 16 larvae per stem, reductions in yield were 53 and 64%, while the rate of leaf node development was reduced 65 and 78%”
Claim · model-written summary
The yield response of alfalfa to larval feeding was more pronounced at 25°–22°C than at 16°–13°C.
- Taxon
- alfalfaMedicago sativae1
- Treatment
- 25°–22°C day-night temperaturee1
- Interactor
- Hypera postica (Gyllenhal)Hypera posticae0pest
- Outcome
- Yield response of alfalfa to larval feedinge1
- Direction
- more pronouncede1
- Comparator
- 16°–13°Ce1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The growth habit and yield response of alfalfa to the feeding of Hypera postica (Gyllenhal) larvae was measured in growth chambers at densities of 2–16 larvae/stem”
e1“Yield response of alfalfa to larval feeding was a proportional reduction of leaf and stem weight, and was more pronounced at 25°–22°C day-night temperature than at 16°–13°C”
Claim · model-written summary
Larval feeding caused a proportional reduction of alfalfa leaf and stem weight.
- Taxon
- alfalfaMedicago sativae1
- Treatment
- larval feedinge1
- Outcome
- leaf and stem weighte1
- Direction
- proportional reductione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Yield response of alfalfa to larval feeding was a proportional reduction of leaf and stem weight, and was more pronounced at 25°–22°C day-night temperature than at 16°–13°C”
Claim · model-written summary
Artificial defoliation did not reduce alfalfa leaf node development rate as much as larval feeding.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- Artificial defoliatione3
- Outcome
- rate of leaf node developmente3
- Direction
- did not cause a comparable reductione3
- Comparator
- feeding of Hypera postica (Gyllenhal) larvaee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The growth habit and yield response of alfalfa to the feeding of Hypera postica (Gyllenhal) larvae was measured in growth chambers at densities of 2–16 larvae/stem”
e3“Artificial defoliation did not cause a comparable reduction in the rate of leaf node development”
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