Ripening late tomatos with bananas

At the end of April I still have some late green tomatos out on my vines. I

want to ripen them before frosts arrive so I took some in recently that
had 
just started to get some colour and put them in a paper bag with a
ripening 
banana. Within a few days the tomatos had ripened. Bananas emit ethylene 
gas, pears or apples can also be used. I have dark green ones in bags at
the 
moment ripening. Well worth doing for ripening late season tomatos if your

autumn sun is rapidly dissappearing but you want to make the most of a
long 
summers crop. I have been enjoying tomatos for 4 months now.

rob