I had some powdery mildew when it was dry in the heatwave but now my big squash patch is getting loads of the downy mildew ( or the other way round I always get them mixed up)

I 've tried that squirty powdery stuff in the past but it wasn't much use as you can't get it on evenly. Also would prefer an organic option. Any suggestions gratefully received. I love winter squash and would be gutted to lose them.