I'd like to report that the lowers I have been spraying are all turning mostly male for absolute certainty...
Thumbs up.
...DC will the rest of the plant still be smokeable?
Given that silver is probably mobile, and that weed is cheap for growers, probably best to pass on sprayed weed. But if you do smoke it, I doubt it will have any harmful effects, but you may notice a bluish tint to your complexion...