Downy mildew of crucifers is a polycyclic disease under natural conditions. The pathogen requires certain specific nutrients which are produced or become available during pathogenesis to proliferate and continue in life cycle. The disease cycle involves the changes in the plant and the plant symptoms as well as those in the pathogen and spans periods within a growing season and from one growing season to the next. The main events in a disease cycle include inoculation (landing of pathogen propagules on the plant in the nature or otherwise), penetration, infection, growth and reproduction of the pathogen, dissemination of the pathogen, and overwintering or oversummering of the pathogen. The disease cycle has been explained in Section 1 (General Disease Cycle on Cruciferous Crops) and Section 2 (Specific Disease Cycle on Arabidopsis).
- Chang IH, Xu RF, Chiu WF (1963) On the primary sources of infection of the downy mildew of Chinese cabbage caused by Peronospora parasitica (Pers.) Fr. and the limited systemic infection of seedlings. Acta Phytopathol Sin 6:153–162Google Scholar
- Felton MW, Walker JC (1946) Environmental factors affecting downy mildew of cabbage. Aust J Agric Res 72:69–81Google Scholar
- Jang P, Safeeulla KM (1990) Modes of entry, establishment and seed transmission of Peronospora parasitica in radish. Proc Indian Acad Sci, Plant Sci 100:369–373Google Scholar
- LeBeau FJ (1945) Systemic invasion of cabbage seedlings by the downy mildew fungus. Aust J Agric Res 71:453–463Google Scholar
- Lucas JA, Hayter JBR, Crute IR (1995) The downy mildews: host specificity and pathogenesis. In: Kohmoto K, Singh US, Singh RP (eds) Pathogenesis and host specificity in plant diseases: histopathological, biochemical, genetic and molecular bases, Eucaryotes, vol II. Pergamon, Oxford, pp 217–238Google Scholar
- Mauch-Mani B, Slusarenko AJ (1994) Downy mildew of Arabidopsis thaliana. In: Bowman J (ed) Arabidopsis—an Atlas of morphology and development. Springer, New York, pp 414–417Google Scholar
- Saharan GS, Naresh M, Sangwan MS (2005) Diseases of oilseed crops. Indus Publication Co., New Delhi. 643pGoogle Scholar