Posted: 01/09/2016 at 11:54
Pumpkin looks fine to me - plenty of time for them to ripen between now and the first frosts - patience is the most important thing in gardening. The leaves of squashes always go a bit manky around now - mine are worse than yours, but the plants are still performing. Don't Panic!
And I wouldn't treat any plant I'm going to eat with anything - a bit of mildew is almost unavoidable, particularly in a dry season like this one. Give the plants plenty of water - take the end of the hose and put it by the roots and turn it on gently for 20 minutes once or twice a week, rather than watering little and often.
I'd be perfectly happy with those plants