The routine I've adopted for this season after my few years of experience is, each plant get some sticky yellow traps, Captain Jack's Dead bug at first sight of anything and Monterey BT mid veg, start of flower and one more time during flower if I see anything.
If anything is still hanging around after a week of spraying the Captain, I hit it one more time, and I always try to spray early morning before the sun gets too strong. I try to use only when needed, so keeping a good eye on my plants is crucial.
I'm in Northern California, Bay Area