Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/22415
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dc.contributor.authorTitmarsh, I Jen
dc.contributor.authorZalucki, M Pen
dc.contributor.authorRoom, P Men
dc.contributor.authorEvans, M Len
dc.contributor.authorGregg, Peteren
dc.contributor.authorMurray, D A Hen
dc.contributor.authorZalucki, M Pen
local.source.editorEditor(s): Myron P Zaluckien
dc.date.accessioned2018-01-30T14:39:00Z-
dc.date.issued1991-
dc.identifier.citationHeliothis:Research Methods and Prospects, p. 49-68en
dc.identifier.isbn3540973303en
dc.identifier.isbn0387973303en
dc.identifier.urihttps://hdl.handle.net/1959.11/22415-
dc.description.abstractAt the single field or farm level, pest managers who consider how Heliothis spp. affect their crops need current information on Heliothis numbers on which to base management decisions and assess the efficacy of past control tactics (Wilson and Room, 1982). At the farming district or regional level, population researchers who consider how crops and control tactics affect Heliothis must assess population densities of Heliothis developmental stages continually. From these data, calculation of current population numbers may be used to estimate, for example, birth and survival rates or assess the worth of alternative control strategies. In all but the smallest areas of interest (for example, a leaf) we can never know exactly how many Heliothis are present, and we must estimate thelr density by sampling. Such estimates may be either absolute, expressing Heliothis densities as numbers per unit area; or relative, measuring population in "unknown" units that allow only temporal and/or spatial comparisons. The latter are either catch per unit effort or trapping methods, the results of which can depend on factors other than population size (Southwood, 1978). The distinction between absolute and relative methods is not always clear, as absolute estimates are usually less than 100% correct al).d relative estimates can be very accurate or adjusted to give absolute estimates (Southwood, 1978).en
dc.languageenen
dc.publisherSpringeren
dc.relation.ispartofHeliothis:Research Methods and Prospectsen
dc.relation.ispartofseriesSpringer series in experimental entomologyen
dc.relation.isversionof1en
dc.titleEstimating the abundance of adults and immaturesen
dc.typeBook Chapteren
dc.identifier.doi10.1007/978-1-4612-3016-8en
dc.subject.keywordsCrop and Pasture Protection (Pests, Diseases and Weeds)en
local.contributor.firstnameI Jen
local.contributor.firstnameM Pen
local.contributor.firstnameP Men
local.contributor.firstnameM Len
local.contributor.firstnamePeteren
local.contributor.firstnameD A Hen
local.contributor.firstnameM Pen
local.subject.for2008070308 Crop and Pasture Protection (Pests, Diseases and Weeds)en
local.subject.seo2008820301 Cottonen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emailpgregg@une.edu.auen
local.output.categoryB1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-chute-20171105-154726en
local.publisher.placeBerlin, Germanyen
local.identifier.totalchapters14en
local.format.startpage49en
local.format.endpage68en
local.series.issn0172-6188en
local.contributor.lastnameTitmarshen
local.contributor.lastnameZaluckien
local.contributor.lastnameRoomen
local.contributor.lastnameEvansen
local.contributor.lastnameGreggen
local.contributor.lastnameMurrayen
local.contributor.lastnameZaluckien
dc.identifier.staffune-id:pgreggen
local.profile.orcid0000-0001-7534-3567en
local.profile.orcid0000-0001-7534-3567en
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:22604en
dc.identifier.academiclevelAcademicen
local.title.maintitleEstimating the abundance of adults and immaturesen
local.output.categorydescriptionB1 Chapter in a Scholarly Booken
local.relation.urlhttps://nla.gov.au/anbd.bib-an7420677en
local.search.authorTitmarsh, I Jen
local.search.authorZalucki, M Pen
local.search.authorRoom, P Men
local.search.authorEvans, M Len
local.search.authorGregg, Peteren
local.search.authorMurray, D A Hen
local.search.authorZalucki, M Pen
local.uneassociationUnknownen
local.year.published1991en
Appears in Collections:Book Chapter
School of Environmental and Rural Science
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