Murdoch University Research Repository

Welcome to the Murdoch University Research Repository

The Murdoch University Research Repository is an open access digital collection of research
created by Murdoch University staff, researchers and postgraduate students.

Learn more

Pythium coloratum and P. sulcatum associated with carrot cavity spot disease in Western Australia

El-Tarabily, K.A., Hardy, G.E.St.J. and Sivasithamparam, K. (1996) Pythium coloratum and P. sulcatum associated with carrot cavity spot disease in Western Australia. In: American Phytopathological Society Annual Meeting, 27 - 31 July, Indianapolis, IN, USA.

Abstract

One hundred and seventy Pythium isolates obtained from carrot cavity spot lesions from a field in Western Australia were found to belong to either P. coloratum or P. sulcatum. In laboratory pathogenicity tests on mature carrots, all isolates of P. coloratum produced large brownish-black water soaked and depressed lesions. In comparison, only a few isolates of P. sulcatum produced lesions, all of which were small. In glasshouse pathogenicity 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 only a few 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 casual agent of cavity spot disease of carrots.

Item Type: Conference Item
Murdoch Affiliation(s): School of Biological Sciences and Biotechnology
URI: http://researchrepository.murdoch.edu.au/id/eprint/19742
Item Control Page Item Control Page