Pest description and damage The female scale insect is approximately 0.05 to 0.1 inch in diameter and white with a notable central yellow spot. The male scale has a more elongated appearance. This insect feeds on the sap within the stem or leaf. Leaves, twigs, branches, and cones are attacked. Their feeding can reduce the vigor of the foliage supported by that stem. Symptoms of scale feeding include loss of normal color and luster of foliage, no new growth, and yellowing and death of branches. Though uncommon, severe infestations may kill entire plants or small trees.
For biology, life history, monitoring and management
See "Scale insect" in:
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