Journal of Insect Behavior (2011) 24, 116-131
James A. Tansey, Lloyd M. Dosdall and Andrew Keddie (2011)
Incorporation of novel Ceutorhynchus obstrictus-resistant canola genotypes into mixed cropping strategies: evidence for associational resistance
Journal of Insect Behavior 24 (2), 116-131
Abstract: Canola genotypes resistant to the cabbage seedpod weevil, Ceutorhynchus obstrictus (Marsham) (Coleoptera: Curculionidae), have recently been developed through introgression of Sinapis alba L. to Brassica napus L. Several lines express antixenosis and antibiosis resistance and have been shown to be less attractive to weevils in visual and olfactory behavioral bioassays. This paper details a small-plot study that assessed the effects on distribution dynamics of weevil adults and larvae of interspersing susceptible among resistant genotypes relative to monocultures over two growing seasons. Results indicate that mixes reduced weevil numbers and oviposition in pods of susceptible genotypes. These results are consistent with associational resistance.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): James A. Tansey, Lloyd M. Dosdall
Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host
environment - cropping system/rotation
Pest and/or beneficial records:
Beneficial | Pest/Disease/Weed | Crop/Product | Country | Quarant.
|
---|---|---|---|---|
Ceutorhynchus obstrictus | Rape/canola (Brassica napus) |