In the fall prof kent had some good info on what and when to spray.
I've used the bonide stuff in the past, and sprayed this year too. Was going to do once a month if I see a reason to do so. Little pahids, japanese beetles, tent catepillar blob, etc.
Feeling I need something better than the bonide. Sprayed and it killed the little tent catepillars eating my young trees, but a few days later they're back. Tempted to put some grease or tape on the trunks so they cant climb into the trees. I'm doubtful bonide has residual effects, just whacks whats there that day. I also saw some young leaf burning. Saw that last year too. Did 1.25oz to a gallon sprayer.