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Pythiums have been described as the “common colds” of plants. They are ubiquitous in vegetable crops and the damage they cause often goes unnoticed except in extreme situations, e.g. damping off disease of parsley seedlings and cavity spot of carrots. Pythiums are found in all environments including soil and surface water, they are fast growing and reproduce quickly. The disease survive as oospores, root exudates. Pythium is favoured by wet soil conditions with a temperature effect which depends on species. Unknown factors in the control of Pythium include:
The aim of this 3 year project is to determine the role of Pythium in causing root rot and canker; identify predisposing factors to disease and disease control strategies using P. sulcatum and parsnip, parsley & coriander as the model pathogen and hosts.
Results : Parsley dieback
Parsnip canker
Acknowledgements : The authors acknowledge the financial contributions from the National Vegetable Levy (AusVeg), Horticulture Australia (HAL) and the Federal Government which made this work possible. Special thanks to vegetable growers Frank and Angelo Lamattina and Darren Schreurs for providing the field site & crops. |
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