I used that this year, but didn't know enough to spray before I already had apple scab. Once I started spraying it kept it under control, so I didn't have any leaves get bad enough to drop off the trees. And new leaves growing after I started spraying were unaffected.
Didn't seem to be the greatest insecticide though. I had a bunch of Rose Chafer beetles. Spraying would take care of the ones present at the time, but more would be back in less than a week. I thought it should last longer. Picked up some liquid Sevin, but can't compare yet as the beetles have run their course and are done now.