United Kingdom 
My courgettes have started to show silver marks along to leaf spines - what is it?
12 Jul, 2013
United Kingdom
My courgettes have started to show silver marks along to leaf spines - what is it?
12 Jul, 2013
Probably powdery mildew. Keep them well watered and fed and pick the fruits regularly. Stress and dry conditions cause this
12 Jul, 2013