Yew: Cottony camellia scale Categories: Conifers Ornamentals Yew Yew Insects Last review date: 2026-09-29 06:57 Last edit date: Cottony camellia scale on yew Photo by: A.L. Antonelli Biology The adult cottony camellia scale is a flat, oval, brownish insect. It is also found on holly and camellia. The scales overwinter on twigs or needles. In […]
Yew: Lecanium scale Categories: Conifers Ornamentals Yew Yew Insects Last review date: 2026-09-29 06:57 Last edit date: Lecanium scales on twig Photo by: R.S. Byther Biology Lecanium scales are shiny brown insects found on leaves and twigs. Adults are 1⁄8″-1⁄4″ in diameter and roughly turtle-shaped. Crawlers (immature scales) are flatter. Scales produce large amounts of […]
Yew: Root weevils Categories: Conifers Ornamentals Yew Yew Insects Last review date: 2026-09-29 06:57 Last edit date: White pine weevil damage on spruce close-up Photo by: C.G. Landgren Biology Root weevil larvae feed on the roots and bark of plants near the crown. The white grubs are found in the soil around the roots. Larval […]
True Fir: Balsam twig aphid Categories: Conifers Ornamentals True Fir True Fir Insects Last review date: 2026-09-29 06:57 Last edit date: Balsam twig aphid Photo by: A.L. Antonelli Biology Balsam twig aphids feed on needles and buds of firs. Three distinct forms of the balsam twig aphid occur. Aphids may be: Small and yellow green […]
True Fir: Balsam woolly adelgid Categories: Conifers Ornamentals True Fir True Fir Insects Last review date: 2026-01-29 12:43 Last edit date: Balsam woolly adelgid damage Photo by: R.S. Byther Biology The balsam woolly adelgids feeds on the stems of true firs. White or grayish cotton-like masses, inside which are the purplish-black insects, can be found […]
True Fir: Coneworms Categories: Conifers Ornamentals True Fir True Fir Insects Last review date: 2026-01-29 12:46 Last edit date: Coneworm larvae on pine Photo by: K. Grey Biology Coneworms attack trees by boring into shoot tips or stems, especially around wounds, and feeding on the soft bark tissues. Tip dieback may result from coneworm feeding. […]
True Fir: Giant conifer aphids Categories: Conifers Ornamentals True Fir True Fir Insects Last review date: 2026-09-29 06:57 Last edit date: Giant conifer aphids on pine Photo by: A.L. Antonelli Biology Giant conifer aphids are large (up to 1⁄5″) and dark brown to black in color. They overwinter as eggs on twigs or branches. Adults […]
True Fir: Spruce budworm Categories: Conifers Ornamentals True Fir True Fir Insects Last review date: 2026-01-27 02:46 Last edit date: Caption: Spruce budworm Photo by: T.J. Fitzgerald Biology These larvae feed on the buds and foliage and may tie shoot tips together with webbing to make a nest. They are typically green to brown in […]
True Fir: Annosus root rot Categories: Conifers Ornamentals True Fir True Fir Diseases Last review date: 2026-01-29 12:02 Last edit date: Annosus root rot decayed wood with black flecks Photo by: B.M. Johnson Biology Annosus root rot is caused by the fungus Heterobasidion annosum. This native soil pathogen is often in large old tree stumps. […]
True Fir: Armillaria root rot Categories: Conifers Ornamentals True Fir True Fir Diseases Last review date: 2026-01-29 12:13 Last edit date: White fungal mat of Armillaria root rot infecting trunk Photo by: C.R. Foss Biology Armillaria root rot is a fungal disease transmitted between plants by root contact. Armillaria is often found in newly cleared […]