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Auteur Geoffrey R. Squire |
Documents disponibles écrits par cet auteur (4)
Affiner la rechercheResponses of plants and invertebrate trophic groups to contrasting herbicide regimes in the Farm Scale Evaluations of genetically modified herbicide–tolerant crops / Cathy Hawes in Philosophical Transactions Royal Society London B, 358 (1439) (29/11/2003)
Titre : Responses of plants and invertebrate trophic groups to contrasting herbicide regimes in the Farm Scale Evaluations of genetically modified herbicide–tolerant crops Type de document : Imprimé Auteurs : Cathy Hawes ; Alison J. Haughton ; Juliet L. Osborne ; D. B. Roy ; S. J. Clark ; J. N. Perry ; Peter Rothery ; David A. Bohan ; David R. Brooks ; Gillian T. Champion ; Alan Dewar ; Matthew S. Heard ; I. P. Woiwod ; R. E. Daniels ; Mark Young ; A. M. Parish ; Rod J. Scott ; Leslie George Firbank ; Geoffrey R. Squire Année de publication : 2003 Article en page(s) : 1899-1913 Langues : Anglais (eng) Résumé : Effects of genetically modified herbicide-tolerant (GMHT) and conventional crop management on invertebrate trophic groups (herbivores, detritivores, pollinators, predators and parasitoids) were compared in beet, maize and spring oilseed rape sites throughout the UK. These trophic groups were influenced by season, crop species and GMHT management. Many groups increased twofold to fivefold in abundance between early and late summer, and differed up to 10-fold between crop species. GMHT management superimposed relatively small (less than twofold), but consistent, shifts in plant and insect abundance, the extent and direction of these effects being dependent on the relative efficacies of comparable conventional herbicide regimes. In general, the biomass of weeds was reduced under GMHT management in beet and spring oilseed rape and increased in maize compared with conventional treatments. This change in resource availability had knock-on effects on higher trophic levels except in spring oilseed rape where herbivore resource was greatest. Herbivores, pollinators and natural enemies changed in abundance in the same directions as their resources, and detritivores increased in abundance under GMHT management across all crops. The result of the later herbicide application in GMHT treatments was a shift in resource from the herbivore food web to the detritivore food web. The Farm Scale Evaluations have demonstrated over 3 years and throughout the UK that herbivores, detritivores and many of their predators and parasitoids in arable systems are sensitive to the changes in weed communities that result from the introduction of new herbicide regimes. Lien pérenne : DOI : 10.1098/rstb.2003.1406 En ligne : https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.2003.1406 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=141305
in Philosophical Transactions Royal Society London B > 358 (1439) (29/11/2003) . - 1899-1913Hawes, Cathy, Haughton, Alison J., Osborne, Juliet L., Roy, D. B., Clark, S. J., Perry, J. N., Rothery, Peter, Bohan, David A., Brooks, David R., Champion, Gillian T., Dewar, Alan, Heard, Matthew S., Woiwod, I. P., Daniels, R. E., Young, Mark, Parish, A. M., Scott, Rod J., Firbank, Leslie George, Squire, Geoffrey R. 2003 Responses of plants and invertebrate trophic groups to contrasting herbicide regimes in the Farm Scale Evaluations of genetically modified herbicide–tolerant crops. Philosophical Transactions Royal Society London B, 358(1439): 1899-1913.The arable seedbank as a source of biodiversity and a reliable indicator of field management / Cathy Hawes (2003)
Titre : The arable seedbank as a source of biodiversity and a reliable indicator of field management Type de document : Extrait d'ouvrage Auteurs : Cathy Hawes ; Joyce McCluskey ; Pete Ianetta ; Milena Maule ; Adele Parish ; Gladys Wright ; Mark Young ; Geoffrey R. Squire Année de publication : 2003 Importance : 172-175 Langues : Français (fre) Catégories : [CBNPMP-Thématique] Germination : généralités
[CBNPMP-Thématique] MessicolePermalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=149800 Hawes, Cathy, McCluskey, Joyce, Ianetta, Pete, Maule, Milena, Parish, Adele, Wright, Gladys, Young, Mark, Squire, Geoffrey R. 2003 The arable seedbank as a source of biodiversity and a reliable indicator of field management. In: Annual report 2001-2002. : 172-175.The physiology of tropical crop production / Geoffrey R. Squire (1990)
Titre : The physiology of tropical crop production Type de document : Imprimé Auteurs : Geoffrey R. Squire Editeur : Oxon, UK : C.A.B. international Année de publication : 1990 Importance : 236 p. Langues : Anglais (eng) Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=79885 Squire, Geoffrey R. , 1990. The physiology of tropical crop production. C.A.B. international, Oxon, UK. 236 pp.Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 18059 2 CBP Livre Herbiers Bibliothèque Consultable The role of weeds in supporting biological diversity within crop fields / Edward Jon Marshall (2003)
Titre : The role of weeds in supporting biological diversity within crop fields Type de document : Tiré à part de revue Auteurs : Edward Jon Marshall (1952-) ; Valerie K. Brown ; Nigel Boatman ; P. J. W. Lutman ; Geoffrey R. Squire ; L. K. Ward Année de publication : 2003 Importance : 77-89 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Messicole Résumé : Weeds are major constraints on crop production, yet as part of the primary producers within farming systems, they may be important components of the agroecosystem. Using published literature, the role of weeds in arable systems for other above-ground trophic levels are examined. In the UK, there is evidence that weed flora have changed over the past century, with some species declining in abundance, whereas others have increased. There is also some evidence for a decline in the size of arable weed seedbanks. Some of these changes reflect improved agricultural efficiency, changes to more winter-sown crops in arable rotations and the use of more broad-spectrum herbicide combinations. Interrogation of a database of records of phytophagous insects associated with plant species in the UK reveals that many arable weed species support a high diversity of insect species. Reductions in abundances of host plants may affect associated insects and other taxa. A number of insect groups and farmland birds have shown marked population declines over the past 30 years. Correlational studies indicate that many of these declines are associated with changes in agricultural practices. Certainly reductions in food availability in winter and for nestling birds in spring are implicated in the declines of several bird species, notably the grey partridge, Perdix perdix. Thus weeds have a role within agroecosystems in supporting biodiversity more generally. An understanding of weed competitivity and the importance of weeds for insects and birds may allow the identification of the most important weed species. This may form the first step in balancing the needs for weed control with the requirements for biodiversity and more sustainable production methods. Lien pérenne : DOI : 10.1046/j.1365-3180.2003.00326.x Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=134138 Marshall, Edward Jon (1952-), Brown, Valerie K., Boatman, Nigel, Lutman, P. J. W., Squire, Geoffrey R., Ward, L. K. 2003 The role of weeds in supporting biological diversity within crop fields. Weed Research, 43(2) : 77-89.Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 21740 JC Tiré à part Bureaux Conservation Consultable
