More to downy mildew disease has been reported in the scientific literature, but cultivar resistance in Canada is not tested or reported publicly. juncea Also referred to as brown mustard, it is a minor crop (from the Cruciferae or Brassicaceae plant family, commonly known as the mustard family) grown in Canada. napus Also referred to as Argentine canola, it is the species of canola currently commonly grown in Canada. Using a crop rotation with non-cruciferous crops, ensuring control alternate hosts such volunteer canola, stinkweed and wild mustard is recommended for general canola disease management. There are currently no fungicides registered for control of downy mildew in canola 4. Most fungal growth/mycelia is contained intercellularly within the cells/tissues for downy mildew, as shown. This photo of downy mildew mycelium in a canola leaf shows the spore-producing structures called conidiophores, which usually come out of stomata.
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