Western Australia, Peronospora destructor, Downy mildew diseases, fungicides
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Further spray experiments conducted this season have confirmed the value of zineb fungicides for controlling the serious downy mildew disease of onions. In these experiments plants sprayed with zineb yielded 20% more marketable onions than unsprayed plants and the disease was also greatly reduced in seed crops.
Doepel, R. F.
"Plant diseases - Downy mildew of onions - Results of further spray trial,"
Journal of the Department of Agriculture, Western Australia, Series 3: Vol. 5:
2, Article 12.
Available at: https://library.dpird.wa.gov.au/journal_agriculture3/vol5/iss2/12