Eastern Spruce Gall Aphid

By The Old House Web

Eastern Spruce Gall Aphid

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The insect overwinters as a female. The female lays eggs near the base of a new shoot. The eggs hatch in about 10 days and the offspring eventually feed near the base of the needles causing it to enlarge and surround the insects. The insects remain in the gall until it opens up in mid- to late-summer. The insects emerge and lay eggs. The eggs hatch and the immature females settle near a bud to spend the winter.

The galls formed by this insect are located at the base of the new growth. The galls weaken the branch and reduce the ornamental value of the tree.

Use Orthene, malathion, Sevin, or Diazinon.

Visuals associated with this text.

Visual title - Visual size Visual title - Visual size
Eastern spruce gall adelgid - 47K Eastern spruce gall adelgid, cross-section of gall - 26K
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