Idaho! I was at Redfish Lake this summer, in the Sawtooths, kind of near Ketchum. ----- For general info, I've attached a link to the University of Idaho's handbook about growing fruit trees. --- As for the insects, were they tiny, with soft bodies? Or bigger, with hard shells? In any case, with the bugs gone now, there's no point in spraying. If we can figure out what they are, I can see whether they'd have laid eggs on the tree, in which case a horticultural oil spray could help prevent them next year. ----- It's been a crazy year for weather, so it could be that you're not getting much fruit because pollination and fruit set were poor. Did you have many flowers on the tree this year?