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Bruchus

The Experts below are selected from a list of 273 Experts worldwide ranked by ideXlab platform

D. Rubiales – 1st expert on this subject based on the ideXlab platform

  • flower and pod source influence on pea weevil Bruchus pisorum oviposition capacity and preference
    Frontiers in Plant Science, 2019
    Co-Authors: T Aznarfernandez, D. Rubiales

    Abstract:

    Bruchus pisorum is an insect pest causing major damage to pea seeds worldwide. Control is difficult and limited resistance is available. In this work we studied the effects of pollen and pod source on insect fecundity and oviposition by comparing resistant and susceptible Pisum spp. accessions and non-host (Lathyrus sativus and Vicia faba) species. A first no-choice assay revealed that the source of flower offered to adults for feeding might retard oviposition (the case of V. faba), reduce fertility (P. sativum ssp. syriacum, P. fulvum and V. faba) or increase adult mortality (V. faba and P. sativum ssp. syriacum). A second no-choice assay with all adults fed with pollen of the same pea cultivar showed significant effect of the source of pods offered. Oviposition was reduced on pods of some resistant Pisum accessions, but particularly low on pods of the non-hosts, being retarded if ever happening and coupled with high mortality of adults. This was confirmed in a third experiment consisting on dual-choice assays showing reduced egg laying in V. faba, L. sativus, P. fulvum and P. sativum ssp. syriacum compared to the commercial variety pea used as a control (Messire).

  • Identification and multi-environment validation of resistance to pea weevil (Bruchus pisorum) in Pisum germplasm
    Journal of Pest Science, 2018
    Co-Authors: T. Aznar-fernández, E. Carrillo-perdomo, F. Flores, D. Rubiales

    Abstract:

    Pea weevil ( Bruchus pisorum ) is a damaging insect pest affecting pea production worldwide. The aim of this study was to identify sources of resistance to pea weevil in a Pisum spp. germplasm in multi-environment field tests. Seed infestation and larval development were assessed in each environment and subjected to a heritability-adjusted genotype and genotype x environment biplot analysis. Results showed that seed infestation and larval development are independent traits. Accessions P669 ( P. sativum ssp. elatius ) and P656 ( P. fulvum ) showed a stable reduction in seed infestation across environments. Meanwhile, accessions P314 ( P. sativum ssp. elatius ) and P1 ( P . abyssinicum ) showed a stable reduction in larval development. The most promising accession was P665 ( P. sativum ssp. syriacum) which showed resistance at both pod and seed levels. This study demonstrates the importance of environmental conditions for pea weevil infestation. Moreover, by submitting data to a CCA, the influence of climatic parameters over seed infestation and larval development has been elucidated.

  • identification of resistance to pea weevil Bruchus pisorum in pea germplasm
    , 2015
    Co-Authors: T Aznarfernandez, Estefania Carrillo, D. Rubiales

    Abstract:

    Trabajo presentado en la V Meeting Asociacion Espanola de Leguminosas, AEL (Eucarpia International Symposium on Protein Crops), celebrada en Pontevedra del 4 al 7 de mayo de 2015.

Hella Wendt – 2nd expert on this subject based on the ideXlab platform

  • Bruchus ecalcaratus K. Daniel, 1906 – ein Synonym zu Bruchus rufimanus Boheman, 1833. (Coleoptera, Chrysomeloidea, Bruchidae)
    Deutsche Entomologische Zeitschrift, 1993
    Co-Authors: Hella Wendt

    Abstract:

    The types of Bruchus ecalcaratus K. Daniel from the mountains of North Italy are studied. The lectotype and three paralectotypes are designated. This species is established as a new synonym to Bruchus rufimanus Boheman.

  • Bruchus ecalcaratus k daniel 1906 ein synonym zu Bruchus rufimanus boheman 1833 coleoptera chrysomeloidea bruchidae
    Deutsche Entomologische Zeitschrift, 1993
    Co-Authors: Hella Wendt

    Abstract:

    The types of Bruchus ecalcaratus K. Daniel from the mountains of North Italy are studied. The lectotype and three paralectotypes are designated. This species is established as a new synonym to Bruchus rufimanus Boheman.

J Huignard – 3rd expert on this subject based on the ideXlab platform

  • intensity of the reproductive diapause in a strain of Bruchus rufimanus boh coleoptera bruchidae originating from the meknes region of morocco
    Acta Oecologica-international Journal of Ecology, 1993
    Co-Authors: J Darquenne, El E Shazly, B Tran, J Huignard

    Abstract:

    Bruchus rufimanus est un Bruchidae univoltin se developpant aux depens des graines de feve (Vicia faba L.). La souche etudiee est originaire de la region de Meknes au Maroc. Dans cette zone, les femelles colonisent les cultures en mars et commencent a pondre sur les gousses vertes a partir du mois d’avril. Les adultes de la nouvelle generation sont en diapause reproductrice et sejournent dans les graines pendant une longue periode. Ce n’est gue lorsque les graines sont placees en atmosphere humide que les adultes quittent les loges nymphales et emergent en decoupant le tegument. Les mâes et un fort pourcentage de femelles levent leur diapause lorsqu’ils sont places en jours longs (16: 8 h LD et 18: 6 h LD)

  • interactions between photoperiod and food affect the termination of reproductive diapause in Bruchus rufimanus boh coleoptera bruchidae
    Journal of Insect Physiology, 1992
    Co-Authors: B Tran, J Huignard

    Abstract:

    Abstract Bruchus rufimanus Boh. is a European bruchid developing at the expense of Vicia faba (L.) seeds. Studies in the wild have shown that the insect is univoltine. Adults present a reproductive diapause in the winter. The end of reproductive diapause results from interactions between increased duration of photophase and ingestion of pollen of the host plant V. faba. Of the two, photoperiod is the determinant parameter, since diapause does not terminate when the photoperiod is shorter than 16 h, whether or not there is feeding. The highest frequency of diapause termination is observed in 18 h light–6 h dark after consumption of the V. faba pollen. The pollen of V. faba is not only a trophic supply, but also a set of specific instructions leading to the termination of diapause, primarily in females. This interaction between climatic and biocenotic factors leads to a precise synchronization between the biological cycle of the insect and that of the host plant. Thus, females become sexually active as soon as the pods, which are the oviposition substrate, are available.

  • Interactions between photoperiod and food affect the termination of reproductive diapause in Bruchus rufimanus (Boh.), (Coleoptera, Bruchidae)
    Journal of Insect Physiology, 1992
    Co-Authors: B Tran, J Huignard

    Abstract:

    Abstract Bruchus rufimanus Boh. is a European bruchid developing at the expense of Vicia faba (L.) seeds. Studies in the wild have shown that the insect is univoltine. Adults present a reproductive diapause in the winter. The end of reproductive diapause results from interactions between increased duration of photophase and ingestion of pollen of the host plant V. faba. Of the two, photoperiod is the determinant parameter, since diapause does not terminate when the photoperiod is shorter than 16 h, whether or not there is feeding. The highest frequency of diapause termination is observed in 18 h light–6 h dark after consumption of the V. faba pollen. The pollen of V. faba is not only a trophic supply, but also a set of specific instructions leading to the termination of diapause, primarily in females. This interaction between climatic and biocenotic factors leads to a precise synchronization between the biological cycle of the insect and that of the host plant. Thus, females become sexually active as soon as the pods, which are the oviposition substrate, are available.