Incorporation of Novel Ceutorhynchus obstrictus-resistant Canola Genotypes Into Mixed Cropping Strategies: Evidence for Associational Resistance

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 l...

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Bibliographic Details
Published in:Journal of insect behavior 2011-03, Vol.24 (2), p.116-131
Main Authors: Tansey, James A, Dosdall, Lloyd M, Keddie, Andrew
Format: Article
Language:English
Subjects:
Agriculture
Animal behavior
Animal Ecology
Antibiosis
associational resistance
Behavioral Sciences
Biological and medical sciences
Biomedical and Life Sciences
Botany
Brassica
Control
Cultivars
Cultural control
Entomology
Evolutionary Biology
Fundamental and applied biological sciences. Psychology
Genotype & phenotype
host choice
Insects
Life Sciences
Neurobiology
Phytopathology. Animal pests. Plant and forest protection
polyculture
Protozoa. Invertebrates
resistance management
Susceptible refugia
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Summary: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.
ISSN:0892-7553
1572-8889
DOI:10.1007/s10905-010-9241-9