Responses of Ceutorhynchus obstrictus (Marsham) (Coleoptera: Curculionidae) to olfactory cues associated with novel genotypes developed by Sinapis alba L. × Brassica napus L

Many herbivorous insects use olfactory cues for host location. Extracts from Brassica napus L. have been shown to elicit electrophysiological and behavioural responses in the cabbage seedpod weevil, Ceutorhynchus obstrictus (Marsham) (syn. C. assimilis (Paykull)) (Coleoptera: Curculionidae). These i...

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Bibliographic Details
Published in:Arthropod-plant interactions 2010-06, Vol.4 (2), p.95-106
Main Authors: Tansey, James A, Dosdall, Lloyd M, Keddie, Andrew, Fletcher, Ron S, Kott, Laima S
Format: Article
Language:English
Subjects:
2-Phenylethyl glucosinolate
Animal behavior
Behavioral Sciences
Biomedical and Life Sciences
Brassica
Brassica napus
Ceutorhynchus obstrictus
Coleoptera
Colonization
Crop plant resistance
Curculionidae
Ecology
Entomology
Flowering
Foliage
Genotypes
Glucosinolates
Host location
Hydrolysis
Insect-plant interactions
Insects
introgression
Invertebrates
Isothiocyanate
Larval development
Life Sciences
Odors
Olfactory stimuli
Original Paper
Plant Pathology
Plant Sciences
Rape plants
semiochemicals
Sinapis alba
Smell
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Summary:Many herbivorous insects use olfactory cues for host location. Extracts from Brassica napus L. have been shown to elicit electrophysiological and behavioural responses in the cabbage seedpod weevil, Ceutorhynchus obstrictus (Marsham) (syn. C. assimilis (Paykull)) (Coleoptera: Curculionidae). These include volatile products of the hydrolysis of glucosinolates. Here we present results of a laboratory olfactometer study examining the attractiveness of odours from flowering racemes and foliage of Sinapis alba L. (an inappropriate host for larval development), B. napus (an excellent host for larval development) and lines derived from S. alba × B. napus selected from colonization studies to demonstrate resistance or susceptibility. Results of this study indicate differential attraction of C. obstrictus to the odours of resistant and susceptible lines and suggest the role of hydrolysis products of glucosinolates, particularly the attractive effects of 2-phenylethyl isothiocyanate.
ISSN:1872-8855
1872-8847
DOI:10.1007/s11829-010-9087-2