Caused by a fungus, it is a common plant disease that affects a number of plants, including lilacs, apples, grapes, cucumbers ...

The expansion includes two other critical fungal diseases, downy mildew and botrytis bunch rot, and the primary fungicides ...

Loveday-based grape grower Jim Giahgias said prolonged rainfall at this time of year after a hot and humid week was perfect for downy mildew disease to form on the leaves of his 100-hectare vineyard.