What's wrong with my tomatoes?

Greetings fellow gardeners . Although not new to gardening, I would appreciate some input from others.

Here in Adelaide, it appears that the tomato season is coming to an end. However I'm concerned with 

a. Mass wilting,drying of leaves.

b. Large nodules on tomato roots.

Yield has been fairly patchy though I tried to provide all the essentials.

Would appreciate any input .Thank you.