Seasonal abundance, spatial distribution and sampling indices of thrip populations on cotton; a 4-year survey from central Greece

dc.contributor.author	Deligeorgidis, PN	en
dc.contributor.author	Athanassiou, CG	en
dc.contributor.author	Kavallieratos, NG	en
dc.date.accessioned	2014-06-06T06:45:08Z
dc.date.available	2014-06-06T06:45:08Z
dc.date.issued	2002	en
dc.identifier.issn	09312048	en
dc.identifier.uri	http://dx.doi.org/10.1046/j.1439-0418.2002.00634.x	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/2267
dc.subject.other	abundance	en
dc.subject.other	cotton	en
dc.subject.other	population density	en
dc.subject.other	sampling	en
dc.subject.other	spatial distribution	en
dc.subject.other	Greece	en
dc.subject.other	Aeolothrips	en
dc.subject.other	Frankliniella intonsa	en
dc.subject.other	Frankliniella occidentalis	en
dc.subject.other	Gossypium hirsutum	en
dc.subject.other	Hexapoda	en
dc.subject.other	Insecta	en
dc.subject.other	Thrips angusticeps	en
dc.subject.other	Thrips tabaci	en
dc.title	Seasonal abundance, spatial distribution and sampling indices of thrip populations on cotton; a 4-year survey from central Greece	en
heal.type	journalArticle	en
heal.identifier.primary	10.1046/j.1439-0418.2002.00634.x	en
heal.publicationDate	2002	en
heal.abstract	Field studies were carried out in order to assess the populations of thrips on cotton leaves, by developing a sampling program to estimate the density with an acceptable level of precision. Thus, in a cotton field (1.1 ha) in central Greece, 45 leaves were collected (one leaf per cotton plant) at 10-day intervals from May to September, for four consecutive growing seasons (1995-98). Five species of thrips were found: Frankliniella intonsa was the most abundant species followed by Thrips angusticeps, Thrips tabaci, Frankliniella occidentalis and Aeolothrips intermedius. Although considerable differences were observed in the population fluctuations among species, the highest population densities, for all species found, were recorded in July and August. As indicated by Taylor's power law estimates, all species presented aggregated distribution among sampling units. As this type of spatial pattern indicates, the accuracy obtained in estimating mean population density increased with the increase of the mean. Furthermore, the increase of the mean caused an exponential decrease in sample size. However, the precision level is acceptable only in high mean values, while at the same time the benefit from an increase in sample size is of no practical value.	en
heal.journalName	Journal of Applied Entomology	en
dc.identifier.issue	7-8	en
dc.identifier.volume	126	en
dc.identifier.doi	10.1046/j.1439-0418.2002.00634.x	en
dc.identifier.spage	343	en
dc.identifier.epage	348	en