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Université de Neuchâtel

Bio-inoculation of yerba mate seedlings (Ilex paraguariensis St. Hill.) with native plant growth-promoting rhizobacteria : a sustainable alternative to improve crop yield

Bergottini, Veronica M ; Otegui, M. B ; Sosa, D. A ; Zapata, P. D ; Mulot, Matthieu ; Rebord, Maxime ; Zopfi, Jakob ; Wiss, F ; Benrey, Betty ; Junier, Pilar

In: Biology and fertility of soils, 2015, vol. 51, no. 6, p. 749-755

In this study, the role of native plant growth-promoting rhizobacteria (PGPR) as bio-inoculants was assessed as an alternative to ameliorate Ilex paraguariensis St. Hill. growth in nursery comparing poorer (soil) versus richer (compost) substrates. Twelve rhizospheric strains isolated from yerba mate plantations were evaluated in vitro for their potential as PGPRs. Three isolates,...

Université de Neuchâtel

Horismenus species (Hymenoptera: Eulophidae) in a bruchid beetle parasitoid guild, including the description of a new species

Hansson, Christer ; Aebi, Alexandre ; Benrey, Betty

In: Zootaxa, 2004, vol. 548, p. 1-16

Four species of Horismenus (Hymenoptera: Eulophidae) associated with Acanthoscelides spp.(Coleoptera: Bruchidae), three of which are also associated with Phaseolus spp., are treated. One of the species, H. butcheri, is described as new and the remaining three species are redescribed. Allfour species are diagnosed in a key. A lectotype is designated for Holcopelte...

Université de Neuchâtel

The potential of native parasitoids for the control of Mexican bean beetles : A genetic and ecological approach

Aebi, Alexandre ; Shani, Tal ; Hansson, Christer ; Contreras-Garduno, Jorge ; Mansion, Guilhem ; Benrey, Betty

In: Biological Control, 2008, vol. 47, no. 3, p. 289–297

Bruchid beetles in the genus Zabrotes are important pests of field and stored beans all around the world and cause enormous economical losses in Mexico and Central America. Native parasitoids have been successfully used to suppress infestations by bruchid beetles in Africa, but few studies have assessed their potential to reduce seed damage in the New World and no successful biological...

Université de Neuchâtel

Isolation and characterization of polymorphic microsatellite markers in Zabrotes subfasciatus Boheman (Coleoptera: Bruchidae)

Aebi, Alexandre ; Shani, Tal ; Butcher, R.D.J ; Alvarez, N ; Risterucci, A.M ; Benrey, Betty

In: Molecular Ecology Notes, 2004, vol. 4, no. 4, p. 752-754

Bruchid beetles of the genus Zabrotes (Coleoptera: Bruchidae) are important worldwide pests of legume seeds. Samples of Zabrotes subfasciatus and Z. sylvestris were collected from seeds of two Phaseolus species throughout Mexico to assess the role of host plant variation and plant domestication on the evolution of host use in this species. For this purpose six...

Université de Neuchâtel

Microsatellite markers in a complex of Horismenus sp. (Hymenoptera: Eulophidae), parasitoids of bruchid beetles

Aebi, Alexandre ; Alvarez, N ; Butcher, R.D.J ; Hansson, C ; Risterucci, A.M ; Benrey, Betty

In: Molecular Ecology Notes, 2004, vol. 4, no. 4, p. 707-709

Parasitoids of the genus Horismenus (Hymenoptera: Eulophidae) are the main natural enemies of bruchid beetles that feed on several species of Phaseolus beans. Samples of Horismenus depressus, H. missouriensis and H. butcheri were collected from seeds of three Phaseolus species throughout Mexico to examine the impact of plant variability on the genetic...

Université de Fribourg

Bottom-Up and top-down effects influence Bruchid beetle individual performance but not population densities in the field

Zaugg, Isabelle ; Benrey, Betty ; Bacher, Sven

In: PLoS ONE, 2013, vol. 8, no. 1, p. e55317

Plant quality (bottom-up) and natural enemies (top-down) can influence the individual performance of herbivorous insects on their host plants, but few studies measured at the same time the influence on population densities in the field. We investigated if plant quality of different wild common bean populations, Phaseolus vulgaris L. (Fabaceae), affects the performance of the bean weevil,...

Université de Fribourg

QUES, a new Phaseolus vulgaris genotype resistant to common bean weevils, contains the Arcelin-8 allele coding for new lectin-related variants

Zaugg, Isabelle ; Magni, Chiara ; Panzeri, Dario ; Daminati, Maria Gloria ; Bollini, Roberto ; Benrey, Betty ; Bacher, Sven ; Sparvoli, Francesca

In: Theoretical and Applied Genetics, 2012, p. -

In common bean (Phaseolus vulgaris L.), the most abundant seed proteins are the storage protein phaseolin and the family of closely related APA proteins (arcelin, phytohemagglutinin and α-amylase inhibitor). High variation in APA protein composition has been described and the presence of arcelin (Arc) has been associated with bean resistance against two bruchid beetles, the bean weevil...

Université de Neuchâtel

Population genetic structure of two primary parasitoids of Spodoptera frugiperda (Lepidoptera), Chelonus insularis and Campoletis sonorensis (Hymenoptera): to what extent is the host plant important?

Jourdie, Violaine ; Alvarez, Nadir ; Molina-Ochoa, Jaime ; Williams, Trevor ; Bergvinson, David ; Benrey, Betty ; Turlings, Ted C. J. ; Franck, Pierre

In: Molecular Ecology, 2010, vol. 19, no. 10, p. 2168-2179

Plant chemistry can strongly influence interactions between herbivores and their natural enemies, either by providing volatile compounds that serve as foraging cues for parasitoids or predators, or by affecting the quality of herbivores as hosts or prey. Through these effects plants may influence parasitoid population genetic structure. We tested for a possible specialization on specific crop...