Hey Sirdabs it's cool man. Don't sweat it too hard just know that any hydro store is pushing product, most of the time without real industry knowledge.
There is so much misinformation regarding spraying/ bombing in bloom. I have been there in my career as a grower using things I thought I knew what I was going. It turns out for years I unknowingly was consuming the bombs and sprays as were my patients. Any systemic fungicide/miticide/ovicide has a certain length of time before it is in low enough dose to not negatively effect you. I have tons of experience spraying flowers late in bloom and my best advice is DON'T DO IT!
Even with mighty wash you will negatively effect the buds flavor, look, and that's if you don't mold out your garden by spraying it down so late in the game.
Lady bugs are great but fly into lights and fizzle up indoors. Also they won't decimate the mites if you're seeing webbing. Really the best thing you can do is vac those webs right off the buds. an keep pushing forward. If you decide to harvest early you will sacrifice flavor, quality, potency, and yield.
Most MMJ folks don't realize this but the mass produced commercial MMJ dispensary weed has upwards of 90% residual of systemic chemicals of Eage-20, Avid (abamectin), IMID etc.
I use neem seed meal in my outdoor soil mix to keep bugs down and away. DE is great stuff too sprinkled on the soil surface and watered in. Even using the DE dusters during veg is a great method. I wouldn't go sprinkling it on my flowers though. Even DE is no match for an already infested grow.
Like everyone is saying, don't panic, do the right thing.
Homebrew420's threads have had me captivated I would suggest reading up on HB's posts. So much excellent info on nutrients and KISS growing!!!
Goodluck
