There is a link to a hop field guide published by USDA. The pocket guide just has pics while the longer guide has more detailed info. It covers everything from diseases, pests, nutrient disorders and pest predators.
Hop Field Guide - Pocket Versionhttp://www.ars.usda.gov/SP2UserFiles/person/37109/HopPocketGuideFINAL.pdf
Hop Field Guidehttp://www.ars.usda.gov/SP2UserFiles/person/37109/HopHandbook2010.pdf
Nice find, thanks for the post!
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