I saw my first Skipper butterfly this morning. I put together a foliar spray that included Bt, soluble NPK, epsom salts, Superthrive, Cytozyme foliar, and Seaweed emulsion. The ingredients vary, depending on what I have at the moment. I take care not to make the foliar solution too strong. On two occasions I've burned leaves with it. Nothing disastrous, but unsightly for a couple weeks.
I used to add a lot of fish emulsion to that mix, but my wife complained that it made the weed take on a strong menthol flavor. I didn't see the down side, but she didn't like it.