Relative competitiveness of glyphosate-resistant and glyphosate-susceptible populations of hairy fleabane, Conyza bonariensis

dc.contributor.author	Travlos, IS	en
dc.contributor.author	Chachalis, D	en
dc.date.accessioned	2014-06-06T06:52:47Z
dc.date.available	2014-06-06T06:52:47Z
dc.date.issued	2013	en
dc.identifier.issn	16124758	en
dc.identifier.uri	http://dx.doi.org/10.1007/s10340-012-0446-x	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/6172
dc.subject	Conyza bonariensis	en
dc.subject	Ecological fitness	en
dc.subject	Glyphosate resistance	en
dc.subject	Replacement series	en
dc.subject.other	biotype	en
dc.subject.other	competitiveness	en
dc.subject.other	fitness	en
dc.subject.other	germination	en
dc.subject.other	glyphosate	en
dc.subject.other	pest control	en
dc.subject.other	pesticide resistance	en
dc.subject.other	population dynamics	en
dc.subject.other	seedling	en
dc.subject.other	temperature effect	en
dc.subject.other	weed	en
dc.subject.other	Conyza	en
dc.subject.other	Conyza bonariensis	en
dc.title	Relative competitiveness of glyphosate-resistant and glyphosate-susceptible populations of hairy fleabane, Conyza bonariensis	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s10340-012-0446-x	en
heal.publicationDate	2013	en
heal.abstract	Hairy fleabane is a weed found increasingly in agronomic crops and rural areas. Although glyphosate resistance is now widespread in this species, the ecological fitness of glyphosate-resistant (GR) and glyphosate-susceptible (GS) populations has not been compared. When seeds of both biotypes were subjected to different alternating temperature, germination occurring and seedling vigor did not differ between the biotypes with maximum germination at 10/20 and 15/25 °C. Under noncompetitive conditions, growth and seed production of the GR and GS biotypes were similar. The competitive ability of the two biotypes, as determined by a replacement series experiment, was also similar. Initially, the relative crowding coefficient (RCC) between the biotypes was close to one. However, the RCC values for each characteristic increased with time indicating that the GR had a small competitive advantage as plants matured. Overall, there was no apparent fitness penalty associated to glyphosate resistance. Therefore, the GR populations are likely to persist unless effective management strategies are adopted. © 2012 Springer-Verlag.	en
heal.journalName	Journal of Pest Science	en
dc.identifier.issue	2	en
dc.identifier.volume	86	en
dc.identifier.doi	10.1007/s10340-012-0446-x	en
dc.identifier.spage	345	en
dc.identifier.epage	351	en