Reference : Effects of allelochemicals from first (Brassicaceae) and second (Myzus persicae and B...
Scientific journals : Article
Life sciences : Biochemistry, biophysics & molecular biology
Life sciences : Environmental sciences & ecology
http://hdl.handle.net/2268/15617
Effects of allelochemicals from first (Brassicaceae) and second (Myzus persicae and Brevicoryne brassicae) trophic levels on Adalia bipunctata
English
Francis, Frédéric [Université de Liège - ULg > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech >]
Lognay, Georges [Université de Liège - ULg > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech >]
Wathelet, Jean-Paul mailto [Université de Liège - ULg > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech >]
Haubruge, Eric mailto [Université de Liège - ULg > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech >]
2001
Journal of Chemical Ecology
Kluwer Academic/Plenum Publishers
27
2
243-256
Yes (verified by ORBi)
International
0098-0331
New York
NY
[en] allelochemical ; glucosinolates ; isothiocyanates ; ladybird ; aphid ; toxicity ; tritrophic interactions
[en] Three Brassicaceae species, Brassica napus (low glucosinolate content), Brassica nigra (including sinigrin), and Sinapis alba (including sinalbin) were used as host plants for two aphid species: the generalist Myzus persicae and the specialist Brevicoryne brassicae. Each combination of aphid species and prey host plant was used to Feed the polyphagous ladybird beetle, Adalia bipunctata. Experiments with Brassicaceae species including different amounts and kinds of glucosinolates (GLS) showed increased ladybird larval mortality at higher GLS concentrations. When reared on plants with higher GLS concentrations, the specialist aphid, B. brassicae, was found to be more toxic than M. persicae. Identification of GLS and related degradation products, mainly isothiocyanates (ITC), was investigated in the first two trophic levels, plant and aphid species, by high-performance liquid chromatography and gas chromatography-mass spectrometry, respectively. While only GLS were detected in M. persicae on each Brassicaceae species, high amounts of ITC were identified in B. brassicae samples (allyl-ITC and benzyl-ITC from B. nigra and S. alba, respectively) from all host plants. Biological effects of allelochemicals from plants on predators through aphid prey are discussed in relation to aphid species to emphasize the role of the crop plant in integrated pest management in terms of biological control efficacy.
http://hdl.handle.net/2268/15617

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Restricted access
42 Allelochemic.pdfPublisher postprint119.73 kBRequest copy

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.