I also sprayed the squash (cucumber, zucchini and the 2 wild squashes of unknown origin) with my mildew cure. They were starting to get a bit of white on the leaves which I’ve learned quickly moves onto a solid covering of white and leaf death. The concoction is:
2 Litre water
1 drop veg oil
1 drop detergent
4 tsp bicarb soda
I mix it all together and spray it on the leaves, top and bottom when the sun isn’t blasting (cloudy day or late afternoon). It works a treat. The only problem is it has to be repeated after every rain.
Update: 20 April 2011 – checking out my sister’s gardening blog Growing In My Garden enlightened me to the fact that this same spray works to keep mould off rose bush leaves as well. I think it’s one of those great cure-alls.