Curtis, thats more or less the list of bug control sprays. I use spinosad along with codling moth granulosis (Cyd-X), and I don’t use so much Bt (Dipel is Bt). I also use codling moth mating disruption (e.g. NoMate spirals), I think this is the best tool overall and am surprised this guy did not mention it. You also need some chemicals for control of scab and other diseases. Here is my approximate schedule.
Delayed dormant (close to but not after 1/2" green leaves show): lime/sulphur, soy oil, sticker at dormant rates.
Petal fall: start Surround coverage. Maintain coverage until PC pressure is negligible, usually it lasts for about a month. I use 3 cups of powder per gallon. If it rains more than an inch of rain you will need to re-apply, and every other week you probably need to spray anyway due to the growth.
Along with the Surround I always mix in some micronized sulphur, e.g. Kumulus, for scab etc, and spinosad and CM granulosis for the moths.
Also at petal fall get the mating disruption lures up.
In the last few years I also include myclobutanil in this spray for cedar apple rust. Its not organic. If you don’t have bad rust you don’t need it.
Looking at my logs from last year I did three such sprays. Once the curculio period is over I usually stop using Surround, it seems like it makes aphids worse and its generally annoying to be around as it gets all over your clothes. This is on apples, I may keep up Surround on peaches and pears for stinkbug control.
In the summer period I don’t do a lot of spraying, maybe one or two sulphur sprays. Its good to do for the summer rots, but they may not be as bad for you given you are in zone 5 (they are pretty horrible here, heat makes them worse). Overall I do something like five sprays total, one delayed dormant, three Surround+, and one sulphur in midsummer.
Scott