[Kajazy]

I think I've identified powdery mildew affecting the pepper and tomato plants in my conservatory - does anyone know what I can do about it?

[mumofstig]

I've not heard of it on tomatoes, so I Googled and e-how says

powdery mildew is not usually seen on home garden tomato plants. It is much more commonly found in commercial tomato growing operations

Anyway it affects plants that are stressed..does it get very hot in the conservatory, have you watered enough?

You could spray with a fungicide like this one
http://www.bayergarden.co.uk/products/product.aspx?productid=188&categoryid=17

[Kajazy]

Yep - it's a hot conservatory and I'm not quite as good at watering as I might hope, sometimes.. 

[mumofstig]

  that explains it then 

[Kajazy]

I know, I know - I like to get things really wrong, and then flap about trying to fix them! Actually, the builder went off with the key to the conservatory, so I haven't been able to get any air in there! Poor wee plants.