Abstract
Abstract The alfalfa weevil, Hypera postica (Gyllenhal), first found in Michigan in 1966, caused considerable damage to alfalfa throughout the state by 1971. In contrast to more southern regions, the alfalfa weevil lays very few eggs in the fall in Michigan. As a result, most eggs and larvae are present when the fields are ready for cutting in the spring. Different cutting dates were evaluated to determine the effects of cutting on populations of the alfalfa weevil, its primary parasite in Michigan, Bathyplectes curculionis (Thomson), and damage to the crop. Cutting at 507 degree-days (base 48°F (8.9 °C)) caused a 79% reduction in the number of alfalfa weevils produced and a 57% reduction of B . curculionis , while almost eliminating crop damage. Cutting at earlier and later times caused different reductions in populations of both insects and different crop damage.
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Claims 4
Claim · model-written summary
Cutting at 507 degree-days reduced the number of alfalfa weevils produced by 79%.
- Taxon
- ALFALFA
Medicago sativat0 - Treatment
- Cutting at 507 degree-dayse1
- Interactor
- alfalfa weevil
Hypera posticae1pest - Outcome
- number of alfalfa weevils producede1
- Direction
- reductione1
- Value
- 79%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Cutting at 507 degree-days (base 48°F (8.9 °C)) caused a 79% reduction in the number of alfalfa weevils produced”
t0“EVALUATING THE EFFECTS OF HARVESTING ALFALFA”
Claim · model-written summary
Cutting at 507 degree-days reduced the population of Bathyplectes curculionis by 57%.
- Taxon
- ALFALFAMedicago sativat0
- Treatment
- Cutting at 507 degree-dayse2
- Interactor
- B . curculionisBathyplectes curculionise2parasite
- Outcome
- B . curculionise2
- Direction
- reductione2
- Value
- 57%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Cutting at 507 degree-days (base 48°F (8.9 °C)) caused a 79% reduction in the number of alfalfa weevils produced and a 57% reduction of B . curculionis , while almost eliminating crop damage”
t0“EVALUATING THE EFFECTS OF HARVESTING ALFALFA”
Claim · model-written summary
Cutting at 507 degree-days almost eliminated crop damage in alfalfa.
- Taxon
- ALFALFAMedicago sativat0
- Treatment
- Cutting at 507 degree-dayse2
- Interactor
- alfalfa weevilsHypera posticae2pest
- Outcome
- crop damagee2
- Direction
- almost eliminatinge2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Cutting at 507 degree-days (base 48°F (8.9 °C)) caused a 79% reduction in the number of alfalfa weevils produced and a 57% reduction of B . curculionis , while almost eliminating crop damage”
t0“EVALUATING THE EFFECTS OF HARVESTING ALFALFA”
Claim · model-written summary
Cutting at earlier and later times caused different reductions in populations of insects and different crop damage.
- Taxon
- ALFALFAMedicago sativat0
- Treatment
- Cutting at earlier and later timese3
- Outcome
- populations of both insectse3
- Direction
- different reductionse3
- Qualifier
- different crop damagee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Cutting at earlier and later times caused different reductions in populations of both insects and different crop damage”
t0“EVALUATING THE EFFECTS OF HARVESTING ALFALFA”
The same questions in other papers
pruning · Hypera postica · Medicago sativa (alfalfa)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
1 paper more in this group
See all 5 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.