Tomato plants – discoloured leaves

QuestionsTomato plants – discoloured leaves
Ray Dunford Staff asked 15 years ago

My dad & I have been growing tomatoes for years but this year, the leaves on some of his otherwise healthy plants have turned a kind of rust colour.Some of the leaves on my plants have turned whitish in the centre of the leave or often the leaf is speckled with this whitish colour. Are these some kind of blight or what do you think?