Here are some hand-picked articles and information provided by the Home Orchard Society.
Pacific Northwest Pests tool: track and forecast the emergence of pests and diseases incredibly accurately, with pictures to help identification: http://pnwpest.org/cgi-bin/ddmodel.us
The Good, The Bad and the Ugly Bugs – http://www.hobbyfarms.com/the-good-the-bad-and-the-ugly-bugs-2/
Recognizing Insect Larval Types – https://entomology.ca.uky.edu/ef017
Spotlight: Apple Maggot – http://entnemdept.ufl.edu/creatures/fruit/tropical/apple_maggot_fly.htm
Coddling Moth: Our #1 Apple Pest – http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn7412.html
Western Cherry Fruit Fly – http://jenny.tfrec.wsu.edu/opm/displaySpecies.php?pn=150
Managing Flatheaded Appletree Borer – http://extentopubs.tamu.edu/eee_00027.html
European Earwig – http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn74102.html
Brown Marmorated Stink Bug in Oregon – http://horticulture.oregonstate.edu/group/brown-marmorated-stink-bug-oregon
See also the HOS Fruit Care Calendar in the resources page.