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Association of Pythium coloratum and Pythium sulcatum with cavity spot disease of carrots in Western Australia

El-Tarabily, K.A., Hardy, G.E.St.J. and Sivasithamparam, K. (1996) Association of Pythium coloratum and Pythium sulcatum with cavity spot disease of carrots in Western Australia. Plant Pathology, 45 (4). pp. 727-735.

Link to Published Version: http://dx.doi.org/10.1046/j.1365-3059.1996.d01-8.x
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Abstract

All 170 Pythium isolates from carrot cavity spot lesions from a field in Western Australia were found to belong to either P. coloratum or P. sulcatum. All isolates of P. coloratum produced large, brownish-black, water-soaked and depressed lesions on mature carrots inoculated with agar plugs colonized by the pathogen. In comparison, only a few isolates of P. sulcatum produced lesions and these were small. In glasshouse trials, P. coloratum produced substantial and numerous lesions at an inoculum density of 0.5% (weight of millet seed-based inoculum/weight of soil), whilst P. sulcatum produced few and small lesions at inoculum densities of 0.8 and 1% and none at 0.5%. This is the first record of P. coloratum as a causal agent of cavity spot of carrots.

Item Type: Journal Article
Murdoch Affiliation(s): School of Biological and Environmental Sciences
Publisher: Wiley-Blackwell
URI: http://researchrepository.murdoch.edu.au/id/eprint/2891
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