Photo 1. Older leaves of cabbage seedlings showing speckled appearance caused by downy mildew, Hyaloperonospora parasitica.
Cabbage downy mildew
Hyaloperonospora parasitica; previously known as Peronospora parasitica. There are different strains of the Oomycete such that the strain on radish does little damage to cabbage.
AUTHOR Grahame Jackson
Photo 1 Diseases of vegetable crops in Australia (2010). Editors, Denis Persley, Tony Cooke, Susan House. CSIRO Publishing. Photo 2 Kohler F, Pellegrin F, Jackson G, McKenzie E (1997) Diseases of cultivated crops in Pacific Island countries. South Pacific Commission. Pirie Printers Pty Limited, Canberra, Australia.
Produced with support from the Australian Centre for International Agricultural Research under project PC/2010/090: Strengthening integrated crop management research in the Pacific Islands in support of sustainable intensification of high-value crop production, implemented by the University of Queensland and the Secretariat of the Pacific Community.
This mini fact sheet is a part of the app Pacific Pests and Pathogens
The mobile application is available from the Google Play Store and Apple iTunes.