Abstract
Abstract Experiments were done in fields of potato in Fredericton, New Brunswick, in 1981, 1982, and 1984 to determine the effect of native predators on the abundance of aphids. The populations of predators were altered by pitfall trapping within plots enclosed by polythene barriers and by applying a selective insecticide. The abundance of aphids was monitored in the enclosed plots and in unenclosed areas serving as control. The experimental design was successful at significantly reducing the numbers of Carabidae in the enclosures compared with the open plots. Aphid populations tended to be larger in the plots with depleted populations of Carabidae than in the control areas and were significantly larger in the plots where the insecticide depleted the populations of canopy level predators. These results suggest that the Carabidae play a relatively minor role in aphid control on the potato crop compared with specific predators.
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Claims 4
Claim · model-written summary
Enclosures with pitfall trapping significantly reduced Carabidae numbers compared with open plots.
- Taxon
- potato
Solanum tuberosume0 - Treatment
- pitfall trapping within plots enclosed by polythene barrierse2
- Outcome
- numbers of Carabidaee1
- Direction
- reducinge1
- Comparator
- open plotse1
- Setting
- Fredericton, New Brunswicke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments were done in fields of potato in Fredericton, New Brunswick, in 1981, 1982, and 1984”
e1“The experimental design was successful at significantly reducing the numbers of Carabidae in the enclosures compared with the open plots”
e2“The populations of predators were altered by pitfall trapping within plots enclosed by polythene barriers”
Claim · model-written summary
Aphid populations tended to be larger in plots with depleted Carabidae than in control areas.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- depleted populations of Carabidaee3
- Interactor
- aphide3pest
- Outcome
- Aphid populationse3
- Direction
- largere3
- Comparator
- control arease3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments were done in fields of potato in Fredericton, New Brunswick, in 1981, 1982, and 1984”
e3“Aphid populations tended to be larger in the plots with depleted populations of Carabidae than in the control areas and were significantly larger in the plots where the insecticide depleted the populations of canopy level predators”
Claim · model-written summary
Insecticide depletion of canopy-level predators significantly increased aphid populations compared with control areas.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- insecticidee3
- Interactor
- aphide3pest
- Second interactor
- canopy level predatorse3biocontrol_agent
- Outcome
- Aphid populationse3
- Direction
- largere3
- Comparator
- control arease3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments were done in fields of potato in Fredericton, New Brunswick, in 1981, 1982, and 1984”
e3“Aphid populations tended to be larger in the plots with depleted populations of Carabidae than in the control areas and were significantly larger in the plots where the insecticide depleted the populations of canopy level predators”
Claim · model-written summary
Carabidae play a relatively minor role in aphid control on the potato crop compared with specific predators.
- Taxon
- potato cropSolanum tuberosume4
- Outcome
- role in aphid controle4
- Comparator
- specific predatorse4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“These results suggest that the Carabidae play a relatively minor role in aphid control on the potato crop compared with specific predators”
The same questions in other papers
insecticide · pest · Solanum tuberosum (potato)Positive and negative results
10 papers in the same direction as this paper · 20 in the opposite direction
- positive
- positive
- positive
27 papers more in this group
See all 31 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.