Pumpkin leaves

I googled yesterday about the white spots on the pumpkin leaves - apparently they are called powdery mildew and it is a form of fungi infection. It is caused by cool nights and humidity. Sigh! They are so fragile ya. In ang mo countries, apparently, it usually happen towards the end of the season (from summer to autumn where the weather changes) .... But for me, it happened so early on! They have just started growing! Oh mine! Read that there are a few ways to get rid of it: baking soda + oil + water concoction or organic sulphur or milk+water concoction. I decided to try the milk+water concoction. Hopefully it will work! If it doesn't, then I will have to kill off all the 4 plants and grow them again!! Sigh....