|Downy Mildew "oilspots"|
|Downy Mildew infected grapes|
The only organic approved fungicides effective against Downy Mildew are based on copper hydroxide and copper sulphate. However we are restricted to using small amounts and they will only help prevent the fungus from spreading and won't eradicate existing infections.
Alex will be spraying the effected areas with copper today and the rest of the vineyard with potassium bicarbonate which may also help.
Not a good weather year for the vineyard!