Identification of disease suppressive soils in Western Australia
Miyan, M.S., Hüberli, D. and MacLeod, W. (2012) Identification of disease suppressive soils in Western Australia. In: 7th Australasian Soilborne Diseases Symposium, 17 - 20 September, Fremantle, Western Australia.
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Survey of cereal root disease was conducted in the early 1980s and in 2006-2008 in Western Australia (WA). Results of these surveys show that there has not been a reduction in the incidence or severity of root diseases during the past 25 years. The greatest levels of all root diseases in WA remained in the southern high rainfall zone. This study was carried out to identify sites which are suppressive for one or more wheat root diseases. Cereal roots were collected from this region and assessed for Rhizoctonia solani (AG8), Fusarium pseudograminearum (fusarium crown rot), Gaeumannomyces graminis var. tritici (take-all) and Pratylenchus neglectus root lesion nematodes; RLN) at anthesis in 2010 and 2011. We identified fourteen paddocks for rhizoctonia, six for take-all, seventeen for crown rot and one for RLN as potentially suppressive in both years. The eleven paddocks identified as suppressive for rhizoctonia in 2010 were bioassayed along with a positive control from Esperance, WA, previously identified to be suppressive. Only the positive control was recorded to be highly suppressive with disease incidence being significantly reduced when 0.5g of carbon was added.
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|Notes:||In: MacLeod W.J. (ed) Proceedings of the Seventh Australasian Soilborne Diseases Symposium, pp 32|
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