Abstract
Abstract 1 The spatio‐temporal distributions of predatory carabid beetles (Coleoptera: Carabidae) and their potential prey, the larvae of three coleopterous pests, Meligethes aeneus (Fabricius) and Ceutorhynchus spp. [ Ceutorhynchus pallidactylus (Marsham), the cabbage stem weevil, and Ceutorhynchus assimilis (Paykull), the cabbage seed weevil], were studied within a crop of winter oilseed rape. The distributions of Collembola were recorded as potential alternative prey. Insect distributions were analysed and compared using Spatial Analysis by Distance Indices. 2 Mature larvae of the pests dropped from the crop canopy to the soil for pupation in temporal succession from May to early July. Their distributions within the crop were irregular and differed with species. 3 Adults of seven species or genera of carabid were abundant and active within the crop during May and June: Nebria brevicollis (Fabricius), Anchomenus dorsalis (Pontoppidan), Loricera pilicornis (Fabricius), Amara similata (Gyllenhal), Asaphidion spp., Pterostichus madidus (Fabricius) and Pterostichus melanarius (Illiger). 4 During May, N. brevicollis was spatially associated with peak numbers of M. aeneus larvae and with Collembola. Anchomenus dorsalis was spatially associated with Ceutorhynchus spp. larvae during two peaks in the abundance of the latter in early and late June. Nebria brevicollis and A. dorsalis coincided in both time and space with larvae of the three coleopterous pests when they were most vulnerable to predation by epigeal predators and are therefore good candidates for conservation biocontrol. 5 The importance of carabid beeetles in the natural enemy complex in winter oilseed rape and their potential for biocontrol of spring and summer pests are discussed in relation to husbandry practices for the crop and its adjacent areas which could be manipulated to promote carabid survival for integrated pest management.
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Claims 6
Claim · model-written summary
Pest larvae fell to soil for pupation in succession from May to early July.
- Taxon
- winter oilseed rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Interactor
- pestse1pest
- Outcome
- larvae of the pests dropped from the crop canopy to the soil for pupatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
t0“winter oilseed rape”
e1“Mature larvae of the pests dropped from the crop canopy to the soil for pupation in temporal succession from May to early July”
Claim · model-written summary
Pest distributions in the crop were irregular and differed by species.
- Taxon
- winter oilseed rapeBrassica napust0
- Outcome
- distributions within the crop were irregular and differed with speciese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oilseed rape”
e1“Their distributions within the crop were irregular and differed with species”
Claim · model-written summary
Seven carabid taxa were abundant and active in the crop during May and June.
- Taxon
- winter oilseed rapeBrassica napust0
- Interactor
- carabide1biocontrol_agent
- Outcome
- carabid were abundant and activee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oilseed rape”
e1“Adults of seven species or genera of carabid were abundant and active within the crop during May and June”
Claim · model-written summary
Nebria brevicollis was spatially associated with peak Meligethes aeneus larvae in May.
- Taxon
- winter oilseed rapeBrassica napust0
- Interactor
- M. aeneus
_(3710884154).jpg?width=60)
Brassicogethes aeneuse1pest - Second interactor
- N. brevicollis
Nebria brevicollise1biocontrol_agent - Outcome
- peak numbers of M. aeneus larvaee1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_(3710884154).jpg?width=500)
Verbatim
t0“winter oilseed rape”
e1“During May, N. brevicollis was spatially associated with peak numbers of M. aeneus larvae and with Collembola”
Claim · model-written summary
Anchomenus dorsalis was spatially associated with Ceutorhynchus larvae in early and late June.
- Taxon
- winter oilseed rapeBrassica napust0
- Interactor
- Ceutorhynchus spp.
Ceutorhynchuse1pest - Second interactor
- Anchomenus dorsalis
_-_(imago)%2C_Elst_(Gld)%2C_the_Netherlands_-_2.jpg?width=60)
Anchomenus dorsalise1biocontrol_agent - Outcome
- Ceutorhynchus spp. larvaee1
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
t0“winter oilseed rape”
e1“Anchomenus dorsalis was spatially associated with Ceutorhynchus spp. larvae during two peaks in the abundance of the latter in early and late June”
Claim · model-written summary
Two carabids coincided with vulnerable pest larvae and were proposed as conservation biocontrol candidates.
- Taxon
- winter oilseed rapeBrassica napust0
- Interactor
- coleopterous pestse1pest
- Outcome
- good candidates for conservation biocontrole1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oilseed rape”
e1“Nebria brevicollis and A. dorsalis coincided in both time and space with larvae of the three coleopterous pests when they were most vulnerable to predation by epigeal predators and are therefore good candidates for conservation biocontrol”