Not unless you spray it on them. I usually do it early in the morn or in the evening ---- otherwise our sun is just too strong & will fry the plants. If you just kind of shake the plants or brush your hand to wiggle them, the pollinators will leave. Then you can spray, wait 10 minutes & rinse. You could harm pollinators if you spray it on them. Alcohol alone will kill wasps in places you don't want soap, such as your house (you know, when the occasional wasp gets inside). Outside, if wasps build nests in really inconvenient places, like right next to your door, you can mix up the dish detergent (Palmolive, Dawn, whatever), alcohol & water & put it in a garden pump sprayer, wait till disk when all the wasps are home & then go spray the nest. Knocks them right down. Then knock the nest itself down.
Well, I went ahead and cut off the stem where the caterpillar was, and disposed of it. Now I'll need to keep an eye on that plant and my other salvia for other signs of this pest.
I think I have seen it in my yard--at least there has been something pink and moth-like flitting around among my red salvia. 
Pretty, but I'm not reading good things about it. 
I love salvia! I hope I don't have to limit my growing of it next year because of this pest!
