Dwc sunset sherbet &gelato 41

Ok guys so its week 4 of flower I've had some issues with mildew and had to do a drastic defoliation session (pictures will be up tomorrow as lights went out as I cut off the last leaf) once all infected leaves had been removed I sprayed the girls with some foliar spray. I've also noticed a few of my buds have their pistils starting to amber which has me worried as they are only in week 4 and are really small(any advice would be appreciated) I've put some pictures of these buds up and I will give a full update with pictures soon. I also fed the girls today ppm 947 ph 6.1 That's all for now guys and gals happy growing