Adelgids (Adelgidae) GDD Window (base 50): 22-618, depending on species Overview: Small, aphid-like insects associated with conifers 1.5mm in length, varying in color by species, from dark reddish-brown to purplish-black. May or … Read More
Balsam twig aphid (Mindarus abietinus) GDD Window (base 50): 100-150 Overview: 1/16 to 1/8″ long, appearance varies with life stage Eggs are brown and covered in white waxy rod-like structures … Read More
Aphids (Aphidoidea) GDD Window (base 50): 7-120 Overview: Small, 1/16″ to 1/8″ long, soft-bodied, pear-shaped insects Range from pink, green, blue-green, black, brown, tan, to yellow in color. May be … Read More
Bagworm (Thyridopteryx ephemeraeformis) GDD Window (base 50): 600-900 Overview: Eggs overwinter in 1-2.5″ pinecone-shaped cases or “bags” that the caterpillar forms and suspends from host plants Small black/gray and amber … Read More
Japanese Maple Scale (Lopholeucaspis japonica) GDD Window (base 50): 800-1200 (1st gen), 2500+ (2nd gen) Overview: Host plants: Large host range, including maples, firethorn, serviceberry, lilac, cotoneaster, Prunus 1st generation crawlers … Read More
Juniper Scale (Carulaspis juniperi) GDD Window (base 50): 22-148 (dormant), 707-1260 (crawlers) Overview: Female covers are circular and white (1/16” in diameter) Male covers are elongated and white, but smaller in size … Read More
White Prunicola Scale (Pseudaulacaspis prunicola) GDD Window (base 50): 707-1151 Overview: Overwinter on bark as mated females Most infestations occur on the stems and major branches Armored scale, difficult to control … Read More
Cryptomeria Scale (Aspidiotus cryptomeriae ‘Kuwana’) GDD Window (base 50): 533-820 Overview: Beware of the scale hiding beneath a transparent cover! Overwinter as immature nymphs in a waxy covering on needles … Read More
Euonymus Scale (Unaspis euonymi) GDD Window (base 50): 533-820 Overview: Armored scale, waxy covering protects them from predators and pesticides (Overwinter on bark as mated females) Scale crawlers are light-yellow in … Read More
Black Vine Weevil (Otiorhynchus sulcatu) GDD Window (base 50): 400-900 Overview: Also known as taxus weevil Larvae are white, legless, and C-shaped with a brown head Adults are gray to … Read More