Association of Pythium coloratum and Pythium sulcatum with cavity spot disease of carrots in Western Australia
EL-TARABILY, K. A. ; ST. J. HARDY, G. E. ; SIVASITHAMPARAM, K.
Oxford, U.K. and Cambridge, USA : Blackwell Science
Published 1996
Oxford, U.K. and Cambridge, USA : Blackwell Science
Published 1996
| ISSN: |
1365-3059
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| Source: |
Blackwell Publishing Journal Backfiles 1879-2005
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| Topics: |
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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| Notes: |
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.
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| Type of Medium: |
Electronic Resource
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| URL: |