- Worldwide distribution. On members of the brassica family, e.g., broccoli, Brussels sprouts, cabbage, cauliflower, Chinese cabbage, radish, and cruciferous weeds. Another species attacks sweetpotato. White rust reduces market value.
- A water mould, an Oomycete, not a fungus is the cause. Spread by rain-splash, wind, insects, and on plants and seeds.
- Cultural control: good quality, reputable seed; long crop rotations; drip rather than overhead irrigation early in the day; use wide plant spacing; optimise plant nutrition; collect and burn debris after harvest; tolerant varieties (except broccoli).
- Chemical control: alternate copper or mancozeb with systemic metalaxyl or phosphorous acid.
Pacific Pests, Pathogens and Weeds - Online edition
Pacific Pests, Pathogens, Weeds & Pesticides
Cabbage white rust (134)
White rust, white blister
Albugo candida. There are different strains. Other species are present in Pacific island countries, for instance, Albugo ipomoeae-aquatica (Photo 1) and Albugo ipomoeae-panduratae.
AUTHOR Grahame Jackson
Information from (including Photos 1&4) Diseases of vegetable crops in Australia (2010). Editors, Denis Persley, et al. CSIRO Publishing, Australia; and from Gerlach WWP (1988) Plant diseases of Western Samoa. Samoan German Crop Protection Project, Deutsche Gesellschaft für Technische Zusammenarbeit (GTZ) Gmbh, Germany; Carr P et al. (2003) White blister (Albugo candida). Vegetable matters-of Facts No. 4. Department of Primary Industries, Victoria. Photos 2&3 Kohler F, et al. (1997) Diseases of cultivated crops in Pacific Island countries. South Pacific Commission. Pirie Printers Pty Limited, Canberra, Australia. Photo 5 Jacquie (Wright) Kami, formerly Plant Pathologist, Secretariat of the Pacific Community, Suva, Fiji. Photos 6&7 Mani Mua, SPC, Sigatoka Research Station, Fiji. Diagram Eric McKenzie (2013) Albugo candida: PaDIL - (http://www.padil.gov.au).
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.