Abstract
BACKGROUND: Oilseed rape (OSR, Brassica napus) is a major crop requiring numerous phytosanitary treatments. It is of paramount importance to find sustainable insect pest management to guarantee long term OSR availability. Therefore, we aimed to evaluate the effect of OSR intercropping with faba beans (FB, Vicia faba) on the OSR insect pest complex. In addition, we aimed to understand the underlying mechanisms of crop protection via intercropping by distinguishing between the effects of visual and physical disruptions caused by companion plants and those of olfactory disruptions in host location and selection, and to evaluate whether this effect is direct or indirect. In a field trial run over 2 years, OSR was grown either as a monocrop or intercropped with winter FB (WFB, frost-resistant), spring FB (SFB, frost-sensitive), or polyethylene artificial plants (ART) designed to mimic FB. RESULTS: Compared to the monocropped OSR the OSR + FB intercropping systems significantly reduced the feeding damage caused by cabbage flea beetles (Phyllotreta spp.), the immigration of adult cabbage stem flea beetles (Psylliodes chrysocephala), the number of rape stem weevil (Ceutorhynchus napi) oviposition punctures on stems and the number of pollen beetle (Brassicogethes aeneus) per inflorescence. The intercropping with SFB had a stronger impact on C. napi and B. aeneus than intercropping with WFB. Compared to the monocropped OSR the ART treatment significantly reduced Phyllotreta spp. damage on leaves, C. napi oviposition punctures and the number of B. aeneus. The yield of OSR intercropped with SFB was higher than monocropped OSR, while the other treatments did not affect yield. CONCLUSION: This study shows that intercropping reduces the incidence of the OSR insect pest complex. Mechanisms of action include the direct visual and physical disruption provided by the companion plants. © 2025 The Author(s). Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Claims 11
Claim · model-written summary
OSR intercropping with faba beans significantly reduced feeding damage by Phyllotreta spp. compared with monocropped OSR.
- Taxon
- Brassica napus
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse0 - Treatment
- OSR + FB intercropping systemse1
- Interactor
- Phyllotreta spp.
Phyllotretae1pest - Outcome
- feeding damagee1
- Direction
- reducede1
- Comparator
- monocropped OSRe1
- Setting
- field triale2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“Oilseed rape (OSR, Brassica napus) is a major crop”
e1“Compared to the monocropped OSR the OSR + FB intercropping systems significantly reduced the feeding damage caused by cabbage flea beetles (Phyllotreta spp.), the immigration of adult cabbage stem flea beetles (Psylliodes chrysocephala), the number of rape stem weevil (Ceutorhynchus napi) oviposition punctures on stems and the number of pollen beetle (Brassicogethes aeneus) per inflorescence”
e2“In a field trial run over 2 years”
Claim · model-written summary
OSR intercropping with faba beans significantly reduced immigration of adult cabbage stem flea beetles compared with monocropped OSR.
- Taxon
- Brassica napusBrassica napuse0
- Treatment
- OSR + FB intercropping systemse1
- Interactor
- Psylliodes chrysocephala
.jpg?width=60)
Psylliodes chrysocephaluse1pest - Outcome
- immigration of adult cabbage stem flea beetlese1
- Direction
- reducede1
- Comparator
- monocropped OSRe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Oilseed rape (OSR, Brassica napus) is a major crop”
e1“Compared to the monocropped OSR the OSR + FB intercropping systems significantly reduced the feeding damage caused by cabbage flea beetles (Phyllotreta spp.), the immigration of adult cabbage stem flea beetles (Psylliodes chrysocephala), the number of rape stem weevil (Ceutorhynchus napi) oviposition punctures on stems and the number of pollen beetle (Brassicogethes aeneus) per inflorescence”
Claim · model-written summary
OSR intercropping with faba beans significantly reduced rape stem weevil oviposition punctures on stems compared with monocropped OSR.
- Taxon
- Brassica napusBrassica napuse0
- Treatment
- OSR + FB intercropping systemse1
- Interactor
- Ceutorhynchus napi
Ceutorhynchus napie1pest - Outcome
- oviposition punctures on stemse1
- Direction
- reducede1
- Comparator
- monocropped OSRe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oilseed rape (OSR, Brassica napus) is a major crop”
e1“Compared to the monocropped OSR the OSR + FB intercropping systems significantly reduced the feeding damage caused by cabbage flea beetles (Phyllotreta spp.), the immigration of adult cabbage stem flea beetles (Psylliodes chrysocephala), the number of rape stem weevil (Ceutorhynchus napi) oviposition punctures on stems and the number of pollen beetle (Brassicogethes aeneus) per inflorescence”
Claim · model-written summary
OSR intercropping with faba beans significantly reduced the number of pollen beetles per inflorescence compared with monocropped OSR.
- Taxon
- Brassica napusBrassica napuse0
- Treatment
- OSR + FB intercropping systemse1
- Interactor
- Brassicogethes aeneus
_(3710884154).jpg?width=60)
Brassicogethes aeneuse1pest - Outcome
- number of pollen beetlee1
- Direction
- reducede1
- Comparator
- monocropped OSRe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_(3710884154).jpg?width=500)
Verbatim
e0“Oilseed rape (OSR, Brassica napus) is a major crop”
e1“Compared to the monocropped OSR the OSR + FB intercropping systems significantly reduced the feeding damage caused by cabbage flea beetles (Phyllotreta spp.), the immigration of adult cabbage stem flea beetles (Psylliodes chrysocephala), the number of rape stem weevil (Ceutorhynchus napi) oviposition punctures on stems and the number of pollen beetle (Brassicogethes aeneus) per inflorescence”
Claim · model-written summary
Intercropping with spring faba beans had a stronger impact on C. napi and B. aeneus than intercropping with winter faba beans.
- Taxon
- Brassica napusBrassica napuse0
- Treatment
- intercropping with SFBe1
- Interactor
- C. napiCeutorhynchus napie1pest
- Second interactor
- B. aeneusBrassicogethes aeneuse1pest
- Outcome
- impact on C. napi and B. aeneuse1
- Direction
- strongere1
- Comparator
- intercropping with WFBe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oilseed rape (OSR, Brassica napus) is a major crop”
e1“The intercropping with SFB had a stronger impact on C. napi and B. aeneus than intercropping with WFB”
Claim · model-written summary
Artificial plant intercropping significantly reduced Phyllotreta spp. damage on OSR leaves compared with monocropped OSR.
- Taxon
- Brassica napusBrassica napuse0
- Treatment
- ART treatmente1
- Interactor
- Phyllotreta spp.Phyllotretae1pest
- Outcome
- damage on leavese1
- Direction
- reducede1
- Comparator
- monocropped OSRe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oilseed rape (OSR, Brassica napus) is a major crop”
e1“Compared to the monocropped OSR the ART treatment significantly reduced Phyllotreta spp. damage on leaves, C. napi oviposition punctures and the number of B. aeneus”
Claim · model-written summary
Artificial plant intercropping significantly reduced C. napi oviposition punctures compared with monocropped OSR.
- Taxon
- Brassica napusBrassica napuse0
- Treatment
- ART treatmente1
- Interactor
- C. napiCeutorhynchus napie1pest
- Outcome
- oviposition puncturese1
- Direction
- reducede1
- Comparator
- monocropped OSRe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oilseed rape (OSR, Brassica napus) is a major crop”
e1“Compared to the monocropped OSR the ART treatment significantly reduced Phyllotreta spp. damage on leaves, C. napi oviposition punctures and the number of B. aeneus”
Claim · model-written summary
Artificial plant intercropping significantly reduced the number of B. aeneus compared with monocropped OSR.
- Taxon
- Brassica napusBrassica napuse0
- Treatment
- ART treatmente1
- Interactor
- B. aeneusBrassicogethes aeneuse1pest
- Outcome
- number of B. aeneuse1
- Direction
- reducede1
- Comparator
- monocropped OSRe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oilseed rape (OSR, Brassica napus) is a major crop”
e1“Compared to the monocropped OSR the ART treatment significantly reduced Phyllotreta spp. damage on leaves, C. napi oviposition punctures and the number of B. aeneus”
Claim · model-written summary
OSR intercropped with spring faba beans had higher yield than monocropped OSR.
- Taxon
- Brassica napusBrassica napuse0
- Treatment
- OSR intercropped with SFBe1
- Outcome
- yielde1
- Direction
- highere1
- Comparator
- monocropped OSRe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oilseed rape (OSR, Brassica napus) is a major crop”
e1“The yield of OSR intercropped with SFB was higher than monocropped OSR, while the other treatments did not affect yield”
Claim · model-written summary
The other intercropping treatments did not affect OSR yield.
- Taxon
- Brassica napusBrassica napuse0
- Treatment
- other treatmentse1
- Outcome
- yielde1
- Direction
- did not affecte1
- Comparator
- monocropped OSRe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oilseed rape (OSR, Brassica napus) is a major crop”
e1“The yield of OSR intercropped with SFB was higher than monocropped OSR, while the other treatments did not affect yield”
Claim · model-written summary
Intercropping with companion plants is a mechanism that reduces insect pest incidence in OSR through direct visual and physical disruption.
- Taxon
- Brassica napusBrassica napuse0
- Outcome
- incidence of the OSR insect pest complexe1
- Qualifier
- direct visual and physical disruption provided by the companion plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oilseed rape (OSR, Brassica napus) is a major crop”
e1“intercropping reduces the incidence of the OSR insect pest complex. Mechanisms of action include the direct visual and physical disruption provided by the companion plants”
The same questions in other papers
intercropping · yield · Brassica napus (oilseed rape)Results differ
19 papers in the same direction as this paper · 8 in the opposite direction · 2 reporting no difference from an alternative
- negative
- positive
- positive
26 papers more in this group
See all 30 papers →intercropping · Psylliodes chrysocephalus · Brassica napus (oilseed rape)Positive and negative results
1 in the opposite direction
- negative
intercropping · Ceutorhynchus napi · Brassica napus (oilseed rape)Results agree
1 paper in the same direction as this paper
- positive
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.