(EDIT: I misremembered some things and corrected them...) 2015 was my first summer grow, and I did a bunch of research and tried to do everything "by the book" so to speak, in terms of spraying my plants for mold and bugs. That year we set one plant aside that we did not spray with anything as an experiment -- and that unsprayed plant did as well or better than the ones we did spray. Since we had all different strains, that could be purely luck/genetics that particular one did well, I completely acknowledge that.
2016 we had rain a couple of times about a week apart in June, and I only sprayed once and then stopped because I figured the rains would wash it off. I wasn't worried though, based on my previous experience I figured I'd be fine. But 2016 was the year moths found us, and we had a horrible worm season. Oddly, the one "no spray" experiment we did that year was not hit by worms at all (again, could be genetics).
So this year I'm spraying again. I've been watching the moths flutter around our garden and I have not seen one land on a cannabis plant, they just fly right by. I don't know if they can "sense" or smell the BT, or if they just don't like the smell of Neem Oil which I use as a base for my spraying, but either way, I hope its working as well as I think it is...
Have you guys been spraying this year? What are you using?
For anyone growing autos, do you bother spraying them? I figure they'll be done long before mold is an issue, and BT would only kill the worms once they hatch and start eating, and I was thinking they'll be done before the worms would hatch.