By Annecarmel
United Kingdom 
A slimmia and rhodedendrum have tops of leavs covered with black substance and undersides have white powder deposits Help!
28 Mar, 2012
By Annecarmel
United Kingdom
A slimmia and rhodedendrum have tops of leavs covered with black substance and undersides have white powder deposits Help!
28 Mar, 2012
Might be scale infestation causing sooty mould, but the white deposits beneath should have a small, shield shaped insect inside. Spray with the version of provado which treats for scale.
29 Mar, 2012