Shirley Tomato leaves - brown/white'ish looks like mould

Hi all,

Please see attached photo of our Shirley tomato plant, it appears to have some white/brownish type fungus although I'm not entirely sure what it is, please could anyone shed any light on this and if there is anything I can do about it?

There are still new leaves coming through but I'm concerned this could spread to those leaves too.

 

Oops think the upload didn't finish - image attached. Thanks

 

Looks it it could be sun scorch. Have they been growing somewhere sheltered then put outside into sunshine (and wind)? It's also known as sunscald, and there are a few more causes.

 

They were grown in a greenhouse prior to me buying them, I then planted them straight out due to the nice weather we had here. I do have other tomato plants out there which aren't having this problem though.

 

That sounds like the reason then, they need to be introduced more slowly to the the aggressive conditions outside of a greenhouse. Runner and french beans leaves are particularly susceptable. For a few days I put them somewhere sheltered and cover with newspaper when the sun's at it brightest.

 

Scorch for sure. Can also be caused by watering during sunshine and the water droplets acting like a magnifying glass.