Hyperparasitism by Sphaerellopsis macroconidialis may lower over-wintering survival of Uromycladium acaciae

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dc.contributor.author Fraser, Stuart
dc.contributor.author McTaggart, Alistair R.
dc.contributor.author Roux, Jolanda
dc.contributor.author Wingfield, Michael J.
dc.date.accessioned 2021-06-07T13:33:35Z
dc.date.issued 2021
dc.description.abstract Uromycladium acaciae has caused an epidemic of wattle rust on Acacia mearnsii in southern Africa since 2013. In April 2016, conidiomata of a species of Sphaerellopsis were observed parasitizing telia of U. acaciae on foliar samples collected from three plantations in Mpumalanga, South Africa. An isolate was identified as Sphaerellopsis macroconidialis based on a phylogenetic species hypothesis of the internal transcribed spacer (ITS) region. This is the first report of this species of mycoparasite from South Africa and on this host. To investigate the seasonal population dynamics of this mycoparasite, the presence of Sphaerellopsis on telia of U. acaciae was assessed monthly between May 2016 and April 2017. The proportion of samples with conidiomata of Sphaerellopsis was greatest between May and November. This period is outside both the peak growing season for A. mearnsii and the main epidemic period for U. acaciae. Results suggest that Sphaerellopsis may have little impact on U. acaciae during epidemic periods of the year but could reduce the over-wintering survival of this damaging rust fungus and lower initial inoculum loads at the start of the following growth season. en_ZA
dc.description.department Forestry and Agricultural Biotechnology Institute (FABI) en_ZA
dc.description.department Plant Production and Soil Science en_ZA
dc.description.embargo 2022-05-04
dc.description.librarian hj2021 en_ZA
dc.description.sponsorship Department of Science and Innovation (DSI)/National Research Foundation (NRF) Centre of Excellence in Tree Health Biotechnology (CTHB); Tree Protection Co-operative Programme (TPCP); Wattle Rust Steering Committee funded by the Sector Innovation Fund (SIF) of the Department of Science and Innovation (DSI); University of Pretoria Postdoctoral Fellowship and New Zealand Ministry for Business Innovation and Employment Science Strategic Investment Fund. en_ZA
dc.description.uri http://wileyonlinelibrary.com/journal/efp en_ZA
dc.identifier.citation Fraser, S., McTaggart, A.R., Roux, J. et al. 2021, 'Hyperparasitism by Sphaerellopsis macroconidialis may lower over-wintering survival of Uromycladium acaciae', Forest Pathology, NYP. en_ZA
dc.identifier.issn 1437-4781 (print)
dc.identifier.issn 1439-0329 (online)
dc.identifier.other 10.1111/efp.12691
dc.identifier.uri http://hdl.handle.net/2263/80242
dc.language.iso en en_ZA
dc.publisher Wiley en_ZA
dc.rights © 2021 Wiley-VCH GmbH. This is the pre-peer reviewed version of the following article : 'Hyperparasitism by Sphaerellopsis macroconidialis may lower over-wintering survival of Uromycladium acaciae', Forest Pathology, vol. , no. , pp. , 2021, doi : 10.1111/efp.12691. The definite version is available at : http://wileyonlinelibrary.com/journal/efp. en_ZA
dc.subject Biocontrol en_ZA
dc.subject Forestry en_ZA
dc.subject Fungi en_ZA
dc.subject Mycoparasite en_ZA
dc.subject Natural enemy en_ZA
dc.subject Uromycladium acaciae en_ZA
dc.subject Sphaerellopsis macroconidialis en_ZA
dc.title Hyperparasitism by Sphaerellopsis macroconidialis may lower over-wintering survival of Uromycladium acaciae en_ZA
dc.type Postprint Article en_ZA


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