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dc.contributor.authorBryant, Racheal H.en
dc.contributor.authorParsons, A.en
dc.contributor.authorRasmussen, S.en
dc.contributor.authorEdwards, Granten
dc.date.accessioned2012-05-24T22:23:34Z
dc.date.issued2008en
dc.identifier.citationBryant, R. H., Parsons, A. J., Rasmussen, S. & Edwards, G. R. (2008). Argentine stem weevil damage to high sugar ryegrass infected with AR1 under field conditions. Proceedings of the New Zealand Grassland Association, 70, 271–276.en
dc.identifier.urihttps://hdl.handle.net/10182/4486
dc.description.abstractPrevious laboratory based studies indicate that, compared to standard cultivars, high sugar grasses (HSG) can have lower endophyte and peramine concentrations and suggest that N fertilisation may result in further reductions in endophyte and alkaloid. This could reduce the resistance of HSG, particularly at high N inputs, to Argentine stem weevil (ASW), but the interaction needs testing under field conditions. The present objective was to determine the effect of ryegrass cultivar on ASW damage, and possible interactions with N fertiliser. ASW damage, endophyte and peramine concentration were measured in three perennial ryegrass cultivars, (HSG diploid, standard diploid and a tetraploid) containing AR1 endophyte, under high and no N fertiliser application. The proportion of tillers damaged by ASW adults or larvae did not differ significantly between cultivars. However, ASW adults tended (P<0.10) to prefer the standard diploid and tetraploid cultivars over the HSG cultivar. Our results are in keeping with previous observations that higher sugar diploid cultivars may have lower endophyte and peramine content than a STD diploid cultivar, but this does not appear to have reduced resistance to ASW. Lack of differences in N content of herbage leaves, between the N fertiliser treatments, likely due to compensating changes in clover content of pastures, meant little effect of N application was seen in this field trial.en
dc.format.extent271-276en
dc.language.isoenen
dc.publisherNew Zealand Grassland Association.en
dc.relationThe original publication is available from - New Zealand Grassland Association.en
dc.rightsCopyright © The Authors and New Zealand Grassland Association.en
dc.sourceProceedings of the Grassland Associationen
dc.subjectLoliumen
dc.subjectListronotus bonariensisen
dc.subjectinvertebratesen
dc.subjectwater soluble carbohydratesen
dc.subjectploidyen
dc.titleArgentine stem weevil damage to high sugar ryegrass infected with AR1 under field conditionsen
dc.typeConference Contribution - Published
lu.contributor.unitLincoln Universityen
lu.contributor.unitFaculty of Agriculture and Life Sciencesen
lu.contributor.unitDepartment of Agricultural Sciencesen
lu.contributor.unitResearch Management Officeen
lu.contributor.unit/LU/Research Management Office/2018 PBRF Staff groupen
pubs.finish-date2008-10-16en
pubs.notesPaper presented at the 70th New Zealand Grassland Association Conference, 14-16 October 2008, Blenheim.en
pubs.organisational-group/LU
pubs.organisational-group/LU/Agriculture and Life Sciences
pubs.organisational-group/LU/Agriculture and Life Sciences/AGSC
pubs.organisational-group/LU/Research Management Office
pubs.organisational-group/LU/Research Management Office/2018 PBRF Staff group
pubs.publication-statusPublisheden
pubs.start-date2008-10-14en
pubs.volume70en
lu.identifier.orcid0000-0002-5004-8147
lu.identifier.orcid0000-0003-4165-007X
lu.subtypeConference Paperen


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