Plasmopara halstedii is absent from Australia and New Zealand
2010 (English)In: Polish Botanical Journal, Vol. 55, no 2, 293-298 p.Article in journal (Refereed) Published
Plasmopara halstedii (Farl.) Berl. & de Toni is among the most important species hampering commercial sunfl owerproduction in many countries. Downy mildew on Arctotheca and Arctotis collected in Australia and New Zealand has been attributedto Plasmopara halstedii, although it has never been reported on sunfl ower in those two countries. Potentially this makesit diffi cult for Australia and New Zealand to claim to be free of sunfl ower downy mildew; this has implications for quarantineand trade. Here we present morphological and molecular analyses of specimens of Plasmopara on Arctotis and Arctotheca collectedin Australia and New Zealand. Our results demonstrate that these plants are not attacked by Plasmopara halstedii but bya new species which we formally describe as Plasmopara majewskii sp. nov. in this study. Consequently, quarantine regulationsfor P. halstedii need to be enforced in order to protect the commercial sunfl ower industry in Australia and New Zealand.
Place, publisher, year, edition, pages
2010. Vol. 55, no 2, 293-298 p.
Research subject Systematic Botany
IdentifiersURN: urn:nbn:se:uu:diva-144699OAI: oai:DiVA.org:uu-144699DiVA: diva2:394269