Photo 2. Downy mildew, Bremia lactucae, on lettuce showing sporulating areas between the main veins.
Lettuce downy mildew
Bremia lactucae; there are several strains of the oomycete.
AUTHOR Grahame Jackson
Information (and Photo 1) from Diseases of vegetable crops in Australia (2010). Editors, Denis Persley, Tony Cooke, Susan House. CSIRO Publishing; and from CABI (2014) Bremia lactucae Crop Protection Compendium. (https://www.cabi.org.cpc/). Photos 2&3 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.
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