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dc.contributor.authorSmallfield, B. M.
dc.contributor.authorWhite, J. G. H.
dc.contributor.authorPenman, D. R.
dc.date.accessioned2012-12-06T21:10:26Z
dc.date.available2012-12-06T21:10:26Z
dc.date.issued1979
dc.identifier.citationSmallfield, B. M., White, J. G. H. & Penman, D. R. (1979). Effect of cool season grazing on lucerne production and aphid populations. In Proceedings of the New Zealand Grassland Association, 41, 42-49en
dc.identifier.urihttps://hdl.handle.net/10182/5097
dc.description.abstractIn a P-year Wairau lucerne trial, plots were grazed on a 3- or 6- weekly rotation; Half of each plot was hard grazed in June to control overwintering aphids. In the second year a spring/autumn spraying was applied. June grazing reduced aphid populations in spring from 37 to 3 per stem, and gave no significant difference in dry matter yield. Three-weekly spelling, although reducing aphid numbers, halved plant populations and root weight and markedly decreased dry matter yield. In the second year, 6-weekly spelling yielded 13 120 kg/ha, and 3-weekly only 3 540 kg/ha. Spraying of aphids increased yields, but not significantly. The results show that cheap methods of controlling aphids in lucerne can be developed using grazing management.en
dc.language.isoenen
dc.publisherNew Zealand Grassland Association.en
dc.relationAvailable at www.grassland.org.nzen
dc.relation.urihttp://www.grassland.org.nz/viewpublication.php?pubID=44en
dc.rightsCopyright © The Authors and New Zealand Grassland Association.en
dc.subjectgrazing managementen
dc.subjectlucerneen
dc.subjectaphidsen
dc.subjectdry matter yielden
dc.titleEffect of cool season grazing on lucerne production and aphid populationsen
dc.typeConference Contribution - Publisheden
lu.contributor.unitDepartment of Agricultural Sciencesen
dc.subject.anzsrc070308 Crop and Pasture Protection (Pests, Diseases and Weeds)en
dc.subject.anzsrc0703 Crop and Pasture Productionen
lu.subtypeConference Paper


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