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Registros recuperados: 4
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Effects of extra floral and floral nectar of Centaurea cyanus on the parasitoid wasp Microplitis mediator: Olfactory attractiveness and parasitization rates Organic Eprints
Géneau, Céline E.; Wäckers, Felix L.; Luka, Henryk; Balmer, Oliver.
Nectar is an important food source for adult parasitoids and can increase their longevity and fecundity and hence their parasitization rate. Both floral and extrafloral nectar are used as food sources by parasitoids. While floralnectar exploitation by parasitoids has been extensive lystudied, little is known on how parasitoid slocate extrafloral nectar,nor whether the availability ofextrafloral nectar increases parasitization of pests in the field. We conducted aY-tube olfactomete rexperiment to determine if the parasitoid Microplitis mediator utilizes olfactory cues tolocate the extrafloral nectar of Centaurea cyanus. Inaddition, weperformed asemi-fieldexperiment to investigate whether M.mediator are differentially attracted by C.cyanus offering...
Tipo: Journal paper Palavras-chave: Biodiversity and ecosystem services Crop health; Quality; Protection.
Ano: 2013 URL: http://orgprints.org/25009/1/Geneau-etal-2013-BiologyControl-66-p16-20.pdf
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Selective flowers to enhance biological control of cabbage pests by parasitoids Organic Eprints
Géneau, Céline E.; Wäckers, Felix L.; Luka, Henryk; Daniel, Claudia; Balmer, Oliver.
Habitat management is an important element in sustainable agriculture and can be used to maximize a range of ecosystem services that support crop production. An important example of such ecosystem services is biological control of pests which can be enhanced by providing arthropod natural enemies with suitable floral resources. The potential risk of this approach, however, is that flowering plants may enhance the fitness of the targeted pests as well. We conducted experiments to identify selective plant species that would improve the longevity and parasitization rate of the parasitoid wasp Microplitis mediator without benefiting its host pest, the cabbage moth Mamestra brassicae. Effects on longevity were also assessed for Diadegma fenestrale, a generalist...
Tipo: Journal paper Palavras-chave: Vegetables Crop health; Quality; Protection.
Ano: 2012 URL: http://orgprints.org/19939/4/Geneau%2Detal%2D2012%2DBasicApplEcol2012.pdf
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Wildflower companion plants increase pest parasitation and yield in cabbage fields: Experimental demonstration and call for caution Organic Eprints
Balmer, Oliver; Géneau, Céline E.; Belz, Elodie; Weishaupt, Bettina; Förderer, Gerda; Moos, Sebastian; Ditner, Nadine; Juric, Ivan; Luka, Henryk.
Monocultures typical of intensive agriculture offer ideal conditions to specialized herbivores while depriving their natural enemies of habitat and nutritional resources. The resulting release of herbivores from both bottom-up and top-down control causes pest outbreaks in economically important crops. Boosting locally occurring natural enemy populations through species-specific habitat management to restore natural herbivore control has been much advocated but remains rarely tested in the field. Here, we investigated whether adding specifically selected flowering plants to monocultures increases parasitation rates of herbivores and crop yield. We performed replicated field experiments in 2 years and found that adding cornflowers (Centaurea cyanus) into...
Tipo: Journal paper Palavras-chave: Vegetables Biodiversity and ecosystem services Crop health; Quality; Protection.
Ano: 2014 URL: http://orgprints.org/36391/1/Balmer_etal_2014_BiolControl_Vol76_p19-27.pdf
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Rearing of Microplitis mediator (Hymenoptera: Braconidae) and its host Mamestra brassicae (Lepidoptera: Noctuidae) Organic Eprints
Belz, Elodie; Géneau, Céline E.; Fürst, Moritz; Balmer, Oliver; Andermatt, Pius; Pfiffner, Lukas; Westerd, Léon; Luka, Henryk.
Establishing continuous and reliable colonies of pest-parasitoid systems in the laboratory is an essential requirement for carrying out manipulative experiments on biological control. Here we describe in detail the rearing protocols that we optimized for the efficient rearing of the cabbage moth Mamestra brassicae and its key parasitoid Microplitis mediator.
Tipo: Journal paper Palavras-chave: Vegetables Biodiversity and ecosystem services Crop health; Quality; Protection.
Ano: 2014 URL: http://orgprints.org/36394/1/Belz_etal_2014_EurJEntomol-Vol111-Issue3_p443-447.pdf
Registros recuperados: 4
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