Future outlook for Pinus patula in South Africa in the presence of the pitch canker fungus (Fusarium circinatum)

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dc.contributor.author Mitchell, R.G. (Richard Glen)
dc.contributor.author Coutinho, Teresa A.
dc.contributor.author Steenkamp, Emma Theodora
dc.contributor.author Herbert, Martin
dc.contributor.author Wingfield, Michael J.
dc.date.accessioned 2013-04-22T07:15:01Z
dc.date.available 2014-04-30T00:20:06Z
dc.date.issued 2012
dc.description.abstract Approximately 50% of the area planted to softwood trees in South Africa has been established with Pinus patula making it the most important pine species in the country. More effort has gone into developing this species for improved growth, tree form and wood properties than with any other species. This substantial investment has been threatened in the last 10 years by the pitch canker fungus, Fusarium circinatum. The fungus infects and contaminates nursery plants and, once transferred to the field, causes severe mortality of young trees in the first year after establishment. Although nurserymen have some control of the disease, it is recognized that the best long-term solution to mitigate damage due to F. circinatum infection is to identify tolerant species, clones and hybrids for deployment in plantations in the future. Research has shown that alternatives such as P. tecunumanii, P. maximinoi and P. elliottii are suitable for warm sites. Pine hybrids, particularly between P. patula and the high elevation sources of P. tecunumanii, appear to be a suitable replacement on sub-temperate and temperate sites. Although these alternative species and hybrids are more sensitive to sub-freezing temperatures than P. patula, their planting range can be increased by including cold tolerance as a selection criterion. Future breeding efforts will most certainly focus on improving the tolerance of pure P. patula to F. circinatum, which can be achieved by identifying specific family crosses and tolerant clones. The commercial deployment of disease tolerant control-pollinated P. patula and hybrid families will most likely be established as rooted cuttings, which requires more advanced propagation technology. In the long term, new seed orchards comprised of P. patula clones tolerant to F. circinatum will be used to produce seed for seedling production. en_US
dc.description.librarian hb2013 en_US
dc.description.uri http://www.tandfonline.com/loi/tsfs20 en_US
dc.identifier.citation Mitchell, RG, Coutinho, TA, Steenkamp, E, Herbert, M & Wingfield, MJ 2012, 'Future outlook for Pinus patula in South Africa in the presence of the pitch canker fungus (Fusarium circinatum)', Southern Forests , vol. 74, no. 4, pp. 203-210. en_US
dc.identifier.issn 2070-2620 (print)
dc.identifier.issn 2070-2639 (online)
dc.identifier.other 10.2989/20702620.2012.741792
dc.identifier.uri http://hdl.handle.net/2263/21341
dc.language.iso en en_US
dc.publisher Taylor & Francis en_US
dc.rights © NISC (Pty) Ltd. This is an electronic version of an article published in Southern Forests, vol. 74, no. 4, pp.203-210,2012. Southern Forests is available online at : http://www.tandfonline.com/loi/tsfs20 en_US
dc.subject Camcore en_US
dc.subject Pinus patula en_US
dc.subject Pinus patula x Pinus tecunumanii en_US
dc.subject Fusarium circinatum en_US
dc.subject Site-species matching en_US
dc.title Future outlook for Pinus patula in South Africa in the presence of the pitch canker fungus (Fusarium circinatum) en_US
dc.type Postprint Article en_US


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