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Control of Phytophthora cinnamomi in cultivated proteas

Dunne, C.P., Dell, B. and Hardy, G.E.St.J. (2003) Control of Phytophthora cinnamomi in cultivated proteas. In: 8th International Congress of Plant Pathology: Solving problems in the real world, (ICPP 2003), 2 - 7 February, Christchurch; New Zealand.


Phytophthora cinnamomi is a common and devastating soil-borne pathogen of cultivated proteas worldwide. When re-planting on diseased sites, plant deaths often occur suddenly and losses can be severe, particularly when conditions are conducive to the pathogen. A field trial was established in the southwest of Western Australia on a protea farm with a history of infection by the pathogen. The trial compares the ability of 3 different pre-planting soil treatments (biofumigation using Indian mustard, fumigation using metham sodium and soil solarisation) when combined with a hardwood mulch/compost to reduce P cinnamomi infection in Leucadendron 'safari sunset'. Banksia stems pieces colonised by Phytophthora were added to the soil prior to the treatments being conducted and removed over the duration of the trial in order to access the infective and survival capabilities of the pathogen. Soil pH, soil EC, soil microbial biomass and the nutritional status of the plants were monitored. All treatments reduced P. cinnamomi infection of safari sunset, with metham sodium being the most successful treatment in reducing infection by the pathogen. Further, all soil treatments reduced the recovery of the pathogen from the inoculum plugs, but metham sodium was the most efficaceous. The potential of these soil treatments to become common techniques in an integrated management approach to controlling P. cinnamomi in cultivated proteas are discussed.

Item Type: Conference Item
Murdoch Affiliation(s): School of Biological Sciences and Biotechnology
Publisher: Horticulture Australia
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