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Journal of the Department of Agriculture, Western Australia, Series 3
Peronospora destructor, Downy mildew diseases, fungicides.
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Downy mildew of onions caused by the fungus Peronospora destructor is widespread in Western Australia. In market gardens adjacent to Perth where the majority of onions are grown the disease occurs each year in spring and early summer crops and often attains epidemic proportions. Onion mildew kills the leaves and so retards bulb development and as a result the yields are often seriously lowered.
Doepel, R. F.
"Plant diseases - Downy mildew of onions,"
Journal of the Department of Agriculture, Western Australia, Series 3: Vol. 4:
3, Article 10.
Available at: https://library.dpird.wa.gov.au/journal_agriculture3/vol4/iss3/10