Abstract
1. Experiments were done in fields of winter wheat at North Farm, West Sussex, and at Rothamsted in 1978 to investigate the effect of predation by carabid beetles and other polyphagous preadtors on populations of cereal aphids. 2. Predator populations were manipulated by pitfall trapping within plot surrounded by polythene barriers and by applying an insecticide (fonofos) within such plots. Plots were set up in March, April, May and June and the development of aphid populations within them compared with aphid populations in unenclosed control areas. 3. The numbers of carabid beetles caught in the enclosed and fonofos-treated plots were much less than in 'control' plots. 4. Aphid populations were all much smaller in 'control' plots than in those with depleted predator populations both at North Farm, where beetle populations were large, and at Rothamsted where populations were small. Aphid populations were much larger in plots where numbers of polyphagous predators were decreased early in the season than where this was done later. 5. There was an inverse relationship between numbers of polyphagous predators and aphids for the North farm experiment. In contrast, there were positive relationships between aphids and aphid-specific predators and between aphids and aphid parasites. This together with the virtual absence of the pathogenic fungus Entomophtora spp, indicated that the differences in aphid density between plots were caused by polyphagous predators rather than by other natural enemies. 6. Comparison of results from the two sites suggested that amongst the carabid beetles Agonum dorsale (Pont.) was the most important aphid predator, but there was also evidence that polyphagous predators other than carabids decreased the cereal aphid populations.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Enclosed fonofos plots had fewer carabid beetles than controls.
- Taxon
- winter wheat
Triticum aestivume1 - Treatment
- enclosed and fonofos-treated plotse0
- Interactor
- carabid beetlese0other
- Outcome
- numbers of carabid beetlese0
- Direction
- much lesse0
- Comparator
- 'control' plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“numbers of carabid beetles caught in the enclosed and fonofos-treated plots were much less than in 'control' plots”
e1“fields of winter wheat”
Claim · model-written summary
Cereal aphid populations were smaller in control plots than predator depleted plots at both sites.
- Taxon
- winter wheatTriticum aestivume1
- Treatment
- 'control' plotse0
- Interactor
- cereal aphidse2pest
- Outcome
- Aphid populationse0
- Direction
- much smallere0
- Comparator
- those with depleted predator populationse0
- Setting
- North Farme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aphid populations were all much smaller in 'control' plots than in those with depleted predator populations both at North Farm, where beetle populations were large, and at Rothamsted where populations were small”
e1“fields of winter wheat”
e2“cereal aphids”
Claim · model-written summary
Aphids were more numerous after early rather than later predator reduction.
- Taxon
- winter wheatTriticum aestivume1
- Treatment
- decreased early in the seasone0
- Interactor
- cereal aphidse2pest
- Second interactor
- polyphagous predatorse0biocontrol_agent
- Outcome
- Aphid populationse0
- Direction
- much largere0
- Comparator
- latere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aphid populations were much larger in plots where numbers of polyphagous predators were decreased early in the season than where this was done later”
e1“fields of winter wheat”
e2“cereal aphids”
Claim · model-written summary
Polyphagous predator and aphid numbers were inversely related at North Farm.
- Taxon
- winter wheatTriticum aestivume1
- Interactor
- aphidsAphidomorphae0pest
- Second interactor
- polyphagous predatorse0biocontrol_agent
- Outcome
- numbers of polyphagous predators and aphidse0
- Direction
- inversee0
- Setting
- North farme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inverse relationship between numbers of polyphagous predators and aphids for the North farm experiment”
e1“fields of winter wheat”
Claim · model-written summary
Aphids and aphid-specific predators were positively related.
- Taxon
- winter wheatTriticum aestivume1
- Interactor
- aphidsAphidomorphae0pest
- Second interactor
- aphid-specific predatorse0biocontrol_agent
- Outcome
- relationships between aphids and aphid-specific predatorse0
- Direction
- positivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“positive relationships between aphids and aphid-specific predators”
e1“fields of winter wheat”
Claim · model-written summary
Entomophtora spp was virtually absent.
- Taxon
- winter wheatTriticum aestivume1
- Interactor
- cereal aphidse2pest
- Second interactor
- Entomophtora sppe0biocontrol_agent
- Outcome
- virtual absence of the pathogenic fungus Entomophtora sppe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“virtual absence of the pathogenic fungus Entomophtora spp”
e1“fields of winter wheat”
e2“cereal aphids”
Claim · model-written summary
Site comparison suggested Agonum dorsale was the most important carabid aphid predator.
- Taxon
- winter wheatTriticum aestivume1
- Interactor
- cereal aphidse2pest
- Second interactor
- Agonum dorsale
_-_(imago)%2C_Elst_(Gld)%2C_the_Netherlands_-_2.jpg?width=60)
Anchomenus dorsalise0biocontrol_agent - Outcome
- most important aphid predatore0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_-_(imago)%2C_Elst_(Gld)%2C_the_Netherlands_-_2.jpg?width=500)
Verbatim
e0“Agonum dorsale (Pont.) was the most important aphid predator”
e1“fields of winter wheat”
e2“cereal aphids”
Claim · model-written summary
Non-carabid polyphagous predators also decreased cereal aphid populations.
- Taxon
- winter wheatTriticum aestivume1
- Interactor
- cereal aphide0pest
- Second interactor
- polyphagous predators other than carabidse0biocontrol_agent
- Outcome
- cereal aphid populationse0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“polyphagous predators other than carabids decreased the cereal aphid populations”
e1“fields of winter wheat”
The same questions in other papers
climate site · pest · Triticum aestivum (wheat)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
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.