Is this the powdery mildew?

[OldManRiver]

Do you mean it’s too late to reverse? I’m harvesting tomorrow. Tons of buds have no signs of PM. Inspected with UV light last night. If I see any sign of PM on a bud I’m throwing it out, but I can’t see why I would throw good ones out.

No need to throw them out. I just mean that actinovate is a prenventative measure, not a treatment once established.

 

[Narsbars]

I haven't used it so close to harvest, but potassium bicarbonate (1TBSP / gal) did a better job than all the other options for me on WPM. Milk, LCPT, H2O2 sorta worked but the potassium bicarb gave me the best results.

Agreed, close to harvest I use the pure potassium bicarbonate with no surfacants as Greencure used to have. You don't need them or the taste close to harvest.