Abstract
Abstract The cotton aphid, Aphis gossypii Glover (Homoptera: Aphididae), is an important cotton pest in northern China, especially in the seedling stage of cotton. After large scale commercial use of transgenic Bt cotton, cotton aphids became one of the most important cotton pests. A 2‐year study was conducted to evaluate the role of four winter wheat varieties that were resistant or susceptible to wheat aphid, Sitobion avenae Fabricius (Homoptera: Aphididae), in conserving arthropod natural enemies and suppressing cotton aphids in a wheat–cotton relay intercropping system in northern China. The results indicated that wheat–cotton intercropping preserved and augmented natural enemies more than a monoculture of cotton. The density of natural enemies in cotton was significantly different among relay‐intercropping fields with different wheat varieties. The highest density of natural enemies and low cotton aphid populations were found in the treatment of cotton in relay intercropped with the wheat variety Lovrin10, which is susceptible to wheat aphid. The lowest density of predators and parasitoids associated with high cotton aphid populations were found with the wheat variety KOK1679, which is resistant to wheat aphid. The results showed that wheat varieties that are susceptible or moderately resistant to wheat aphid might reduce cotton aphids more effectively than an aphid‐resistant variety in the intercropping system by enhancing predators to suppress cotton aphids during the cotton seedling stage.
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Claims 7
Claim · model-written summary
Wheat–cotton intercropping preserved and augmented natural enemies more than a monoculture of cotton.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- wheat–cotton intercroppinge1
- Interactor
- natural enemiese1biocontrol_agent
- Outcome
- natural enemiese1
- Direction
- augmentede1
- Comparator
- a monoculture of cottone1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton aphids”
e1“wheat–cotton intercropping preserved and augmented natural enemies more than a monoculture of cotton”
Claim · model-written summary
Density of natural enemies in cotton differed significantly among relay-intercropping fields with different wheat varieties.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- different wheat varietiese3
- Interactor
- natural enemiese2biocontrol_agent
- Outcome
- density of natural enemiese2
- Direction
- significantly differente2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton aphids”
e2“The density of natural enemies in cotton was significantly different”
e3“with different wheat varieties”
Claim · model-written summary
The highest natural enemy density in cotton occurred with the wheat variety Lovrin10 relay intercropped.
- Taxon
- cottonGossypium hirsutumt0
- Material
- Lovrin10e4
- Treatment
- relay intercropped with the wheat variety Lovrin10e4
- Interactor
- natural enemiese4biocontrol_agent
- Outcome
- density of natural enemiese4
- Direction
- higheste4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton aphids”
e4“The highest density of natural enemies and low cotton aphid populations were found in the treatment of cotton in relay intercropped with the wheat variety Lovrin10, which is susceptible to wheat aphid”
Claim · model-written summary
Cotton aphid populations were low in cotton relay intercropped with the wheat variety Lovrin10.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- relay intercropped with the wheat variety Lovrin10e4
- Interactor
- cotton aphid
Aphis gossypiie4pest - Outcome
- cotton aphid populationse4
- Direction
- lowe4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton aphids”
e4“The highest density of natural enemies and low cotton aphid populations were found in the treatment of cotton in relay intercropped with the wheat variety Lovrin10, which is susceptible to wheat aphid”
Claim · model-written summary
The lowest density of predators and parasitoids occurred with the wheat variety KOK1679.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- the wheat variety KOK1679e5
- Interactor
- predators and parasitoidse5biocontrol_agent
- Outcome
- density of predators and parasitoidse5
- Direction
- loweste5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton aphids”
e5“The lowest density of predators and parasitoids associated with high cotton aphid populations were found with the wheat variety KOK1679, which is resistant to wheat aphid”
Claim · model-written summary
Cotton aphid populations were high with the wheat variety KOK1679.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- the wheat variety KOK1679e5
- Interactor
- cotton aphidAphis gossypiie5pest
- Outcome
- cotton aphid populationse5
- Direction
- highe5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton aphids”
e5“The lowest density of predators and parasitoids associated with high cotton aphid populations were found with the wheat variety KOK1679, which is resistant to wheat aphid”
Claim · model-written summary
Wheat varieties susceptible or moderately resistant to wheat aphid might reduce cotton aphids more effectively than an aphid-resistant variety, by enhancing predators.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- wheat varieties that are susceptible or moderately resistant to wheat aphide6
- Outcome
- cotton aphidse6
- Direction
- reducee6
- Qualifier
- by enhancing predatorse6
- Comparator
- an aphid‐resistant varietye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton aphids”
e6“wheat varieties that are susceptible or moderately resistant to wheat aphid might reduce cotton aphids more effectively than an aphid‐resistant variety in the intercropping system by enhancing predators”
The same questions in other papers
Triticum aestivum · ecology: diversity · Gossypium hirsutum (cotton)Results agree
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- positive
Triticum aestivum · Aphis gossypii · Gossypium hirsutum (cotton)Results agree
3 papers in the same direction as this paper
- positive
- positive
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intercropping · ecology: diversity · Gossypium hirsutum (cotton)Positive and negative results
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- positive
- no effect
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1 paper more in this group
See all 5 papers →intercropping · Aphis gossypii · Gossypium hirsutum (cotton)Results agree
4 papers in the same direction as this paper
- positive
- 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.