Minor pests can be a major problem in certain fields. Often there are few control options, but proper identification and help determine if the problem will get worse.
CTN 23: Minor Pests of Fraser Fir Christmas Trees – includes information on both insects (white pine cone beetles, terminal attackers, bagworms, gypsy moth, seed and cone insects, scales) and diseases (Botrytis shoot blight, sooty mold, fern/fir rust, Rhizosphaera needle cast, Annosum butt and root rot, Rosellinia blight, Nectria canker)
Other On-Line Resources:
Pacific Northwest Pest Management Handbooks: Fir, True (Abies spp.) – Rusts – Includes control recommendations