sadly I don't think there is for amateur gardeners. if the fruit are well developed then they could be picked and allowed to ripen in a bowl in the sun.

You could remove affected leaves now, but don't add them to you home compost.

Thank you for your advice, I seem to have let the garden get a bit out of hand this year so it may be my own fault. I will pick the toms and hope they ripen ok. I will burn the leaves and hope for next year is better. Cecelia

To help picked green tomatoes ripen:They do not need to be kept in the sun for this to happen. Put a ripe banana or even just a ripe skin with them. It will give off ethylene gas that has the effect of hastening ripening. What worked for me was putting a clean cloth on a spare bed and laying them out on it.

Great, I wish you lived next door I would learn such a lot from your experience. Happy gardening Cecelia

Its only a few little tips you pick up as you go along. When you discover it works it will be your turn to impress somebody else...