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

K.A. El-Tarabily; G.E.S. Hardy; Krishnapillai Sivasithamparam

doi:10.1046/j.1365-3059.1996.d01-8.x

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

K.A. El-Tarabily, G.E.S. Hardy, Krishnapillai Sivasithamparam

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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.

Original language	English
Pages (from-to)	727-735
Journal	Plant Pathology
Volume	45
DOIs	https://doi.org/10.1046/j.1365-3059.1996.d01-8.x
Publication status	Published - 1996

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10.1046/j.1365-3059.1996.d01-8.x

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title = "Association of Pythium coloratum and Pythium sulcatum with cavity spot disease of carrots in Western Australia",

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.",

author = "K.A. El-Tarabily and G.E.S. Hardy and Krishnapillai Sivasithamparam",

year = "1996",

doi = "10.1046/j.1365-3059.1996.d01-8.x",

language = "English",

volume = "45",

pages = "727--735",

journal = "Plant Pathology",

publisher = "John Wiley & Sons",

}

TY - JOUR

T1 - Association of Pythium coloratum and Pythium sulcatum with cavity spot disease of carrots in Western Australia

AU - El-Tarabily, K.A.

AU - Hardy, G.E.S.

AU - Sivasithamparam, Krishnapillai

PY - 1996

Y1 - 1996

N2 - 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.

AB - 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.

U2 - 10.1046/j.1365-3059.1996.d01-8.x

DO - 10.1046/j.1365-3059.1996.d01-8.x

M3 - Article

VL - 45

SP - 727

EP - 735

JO - Plant Pathology

JF - Plant Pathology

ER -

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

Abstract

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