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Forest Pests of North America
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Pine Needle Scale

Chionaspis pinifoliae (Fitch)

From: Field Guide to Diseases and Insect Pests of Idaho and Montana Forests, USDA Forest Service Northern Region, Publication Number R1-89-54

Hosts. – Lodgepole and ponderosa pine, occasionally spruce and Douglas-fir. May be common on ornamental pines.

Distribution. – in Idaho and Montana where pines are native or planted.

Damage. – Nymphs suck fluid from needles turning them yellow brown. Ornamentals become unattractive when covered with white, waxy adults and their secretions. Heavy populations can kill trees after a few years.

Identification. – Scales may be seen on needles any time of the year. The scales are white, one-eighth inch long, elongate oval, and are yellow at the apex (fig. 125). Rusty brown eggs are under the scales in the winter. Scale infestations are often associated with excessive road dust or other factors affecting tree vigor.

Similar damages. – Damage may be similar to that caused by other agents which cause needle discoloration such as black pineleaf scale, pine needle casts, winter desiccation, drought, and

Figure 125 - Pine Needle Scales
on pine needles. Bright red eggs
may be found beneath scales
during the winter.
aphids. If scales are present, diagnosis is assured.

Link to Images in Forestry Images

References.

Anonymous. 1982. For. Insect & disease identification and management. USDA For. Serv., Northern Region; Idaho Dept. of Lands, Insect and Disease Control; Montana Dept. of State Lands, Division of Forestry. 192 p.

Furniss, R. L., and V. M. Carolin. 1977.  Western For. Insects. USDA Forest Serv., Misc. pub. 1339, 654 p., illus.

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