You really think spraying BT all over your flowers isnt affecting them? Ive always heard not to during flowering....
I started using Bt for tomato worms before I started growing pot.
A friend warned me about bud worms before I got my first crop in. I started using Bt on my Cannabis, too.
If you read the contents of the Bt preparation, you'll realize that maple sugar is the worst part of it. That can be washed away a few days after application.
Enough Bt bacteria remain to snuff any worms, for a few weeks.
There are far worse things in the dust that settles on your plants.
I give my girls a bath weekly, but during late flowering, I choose my days, carefully, picking warm dry days to rinse the plants in the morning.
I've been using Bt for decades and exclusively smoking my home grown. Never noticed anything negative.
I know of nothing that outperforms and is less toxic than Bt. Do you?
Bud worms can each destroy at least one khola, in a very short time.
I'll take my chances.
BTW, my late season applications are set at a very fine mist, which doesn't penetrate the bud enough to cause mold problems.
Earlier, the Bt is one part of the mixture I use to foliar feed, which is a drench.
My greenhouses very rarely get worms, but I've found butterflies in them, so I spray those plants lightly, as well.