Can anyone please help with tips/advice? (Guildford, Surrey resident). 5 year old "box ball" (1 of 2) - I have just found a patch of leaves turned copper colour, at the back of the ball which faced the wall. Googled it, & find it is "box blight". Have heavily pruned affected area, (it looks like someone has taken a bite out of an apple now!) have removed all fallen leaves, changed the soil, replacing with mixture of topsoil & vermiculite (no compost they say) & sprayed it with a general fungicide. the 2nd box ball is not infected. I have thoroughly cleaned all tools & gloves used. Question is: is there anything else I can do to save my plant?