August 1, 2022
Searles Gardening Team
What are Downy Mildew symptoms? (Plasmopara viticola)
Downy Mildew is a fungal disease problem that can affect many different plant species yet is mainly found on the foliage of some flowers species such as Roses and Pelargoniums. Plus many productive plants like Grape vines, Cucurbits (zucchini and pumpkin etc) and many members of the brassica family including cabbages and mustard greens.
Downy mildew can be recognised as yellowish to white random markings on the top side of the foliage, while underneath these affected areas are covered in a fine grey film or mould. On Roses and pelargoniums it is often spotted directly on the flower stems and buds as a grey mould.
Downy Mildew can severely damage the foliage of many edible and productive plants as it spreads through the foliage leaving it withered and shrivelled regardless of how well you maybe watering.
This can eventually weaken plants to the point of death.
Control Downy Mildew by spraying with Searles Mancozeb.