Utah State University Extension publishes a great weekly pest newsletter that covers many topics extremely relevant to apple growing in our neck of the woods. View and subscribe to the newsletter here: http://utahpests.usu.edu/IPM/htm/advisories/treefruit.
They also recently published a very detailed 34-slide presentation on New Insecticides, Application Timings, and Registration Updates. Download it here.
Many thanks to Dennis Norton for the tips.
