Abstract
Populations of aphids on Victory oats were studied during the 4 years 1957–60 at Vancouver, British Columbia. The aphids found, in order of abundance, were: the English grain aphid, Macrosiphum avenae (F.) (= granarium (Kirby)), the rose grass aphid, Metopolophium dirhodum (Walker), and the bird-cherry oat aphid, Rhopalosiphum padi (L.). M. avenae and R. padi overwintered as viviparae on small grains and grasses; M. dirhodum overwintered as eggs on Rosa spp. Winged migrants moved to spring-sown oats late in May or in June. Maximum aphid density was low in 1958, moderate in 1957 and 1959, and high in 1960. Predators and parasites were important factors in governing the aphid populations.Yield data from 25 pairs of insecticide-treated and untreated plots showed no significant advantage in yield of oats and only small gains in yield of straw from controlling aphids. The economic injury level for aphids on oats under conditions similar to those in the experimental fields is, therefore, higher than 47 aphids per tiller. General application of non-selective insecticides to control aphids on oats in British Columbia is not recommended.
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Claims 13
Claim · model-written summary
Macrosiphum avenae was the most abundant aphid found on Victory oats.
- Taxon
- oats
Avena sativae0 - Material
- Victorye0
- Interactor
- Macrosiphum avenaee0pest
- Outcome
- in order of abundancee0
- Setting
- Vancouver, British Columbiae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Populations of aphids on Victory oats were studied during the 4 years 1957–60 at Vancouver, British Columbia. The aphids found, in order of abundance, were: the English grain aphid, Macrosiphum avenae (F.) (= granarium (Kirby)), the rose grass aphid, Metopolophium dirhodum (Walker), and the bird-cherry oat aphid, Rhopalosiphum padi (L.).”
Claim · model-written summary
Metopolophium dirhodum was second in abundance on Victory oats.
- Taxon
- oatsAvena sativae1
- Material
- Victorye1
- Interactor
- Metopolophium dirhodum
.jpg?width=60)
Metopolophium dirhodume0pest - Outcome
- in order of abundancee0
- Setting
- Vancouver, British Columbiae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The aphids found, in order of abundance, were: the English grain aphid, Macrosiphum avenae (F.) (= granarium (Kirby)), the rose grass aphid, Metopolophium dirhodum (Walker), and the bird-cherry oat aphid, Rhopalosiphum padi (L.).”
e1“Populations of aphids on Victory oats were studied during the 4 years 1957–60 at Vancouver, British Columbia.”
Claim · model-written summary
Rhopalosiphum padi was third in abundance on Victory oats.
- Taxon
- oatsAvena sativae1
- Material
- Victorye1
- Interactor
- Rhopalosiphum padi
_Figure_1_a.jpg?width=60)
Rhopalosiphum padie0pest - Outcome
- in order of abundancee0
- Setting
- Vancouver, British Columbiae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Figure_1_a.jpg?width=500)
Verbatim
e0“The aphids found, in order of abundance, were: the English grain aphid, Macrosiphum avenae (F.) (= granarium (Kirby)), the rose grass aphid, Metopolophium dirhodum (Walker), and the bird-cherry oat aphid, Rhopalosiphum padi (L.).”
e1“Populations of aphids on Victory oats were studied during the 4 years 1957–60 at Vancouver, British Columbia.”
Claim · model-written summary
M. avenae overwintered as viviparae on small grains and grasses.
Verbatim
e0“M. avenae and R. padi overwintered as viviparae on small grains and grasses”
Claim · model-written summary
R. padi overwintered as viviparae on small grains and grasses.
- Taxon
- small grains and grassese0
- Interactor
- R. padiRhopalosiphum padie0pest
- Outcome
- overwintered as viviparaee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“M. avenae and R. padi overwintered as viviparae on small grains and grasses”
Claim · model-written summary
M. dirhodum overwintered as eggs on Rosa spp.
- Interactor
- M. dirhodumMetopolophium dirhodume0pest
- Outcome
- overwintered as eggse0
RosaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“M. dirhodum overwintered as eggs on Rosa spp.”
Claim · model-written summary
Winged aphid migrants reached spring-sown oats in late May or June.
- Taxon
- oatsAvena sativae0
- Interactor
- aphidsAphidomorphae1pest
- Outcome
- Winged migrants moved to spring-sown oatse0
- Qualifier
- late in May or in Junee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winged migrants moved to spring-sown oats late in May or in June.”
e1“Populations of aphids on Victory oats”
Claim · model-written summary
Maximum aphid density varied from low in 1958 to high in 1960.
- Taxon
- OATSAvena sativat0
- Interactor
- aphide0pest
- Outcome
- Maximum aphid densitye0
- Value
- low in 1958, moderate in 1957 and 1959, and high in 1960e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum aphid density was low in 1958, moderate in 1957 and 1959, and high in 1960.”
t0“OATS”
Claim · model-written summary
Predators and parasites were important in governing aphid populations.
- Taxon
- OATSAvena sativat0
- Interactor
- Predators and parasitese0biocontrol_agent
- Outcome
- aphid populationse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Predators and parasites were important factors in governing the aphid populations.”
t0“OATS”
Claim · model-written summary
Insecticide control produced no significant oat yield advantage.
- Taxon
- oatsAvena sativae0
- Treatment
- insecticide-treatede0
- Outcome
- yield of oatse0
- Direction
- no significant advantagee0
- Comparator
- untreated plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield data from 25 pairs of insecticide-treated and untreated plots showed no significant advantage in yield of oats”
Claim · model-written summary
Insecticide control produced only small gains in straw yield.
- Taxon
- oatsAvena sativae0
- Treatment
- insecticide-treatede0
- Interactor
- aphidsAphidomorphae0pest
- Outcome
- yield of strawe0
- Direction
- small gainse0
- Comparator
- untreated plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield data from 25 pairs of insecticide-treated and untreated plots showed no significant advantage in yield of oats and only small gains in yield of straw from controlling aphids.”
Claim · model-written summary
The economic injury level was inferred to exceed 47 aphids per tiller under comparable field conditions.
- Taxon
- oatsAvena sativae0
- Interactor
- aphidsAphidomorphae0pest
- Outcome
- economic injury level for aphidse0
- Direction
- higher thane0
- Value
- 47 aphids per tillere0
- Qualifier
- under conditions similar to those in the experimental fieldse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The economic injury level for aphids on oats under conditions similar to those in the experimental fields is, therefore, higher than 47 aphids per tiller.”
Claim · model-written summary
General non-selective insecticide application to control aphids on oats in British Columbia was discouraged.
- Taxon
- oatsAvena sativae0
- Interactor
- aphidsAphidomorphae0pest
- Outcome
- General application of non-selective insecticidese0
- Setting
- British Columbiae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“General application of non-selective insecticides to control aphids on oats in British Columbia is not recommended.”
The same questions in other papers
insecticide · yield · Avena sativa (oats)Results agree
1 paper in the same direction as this paper
- 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.