Michigan State University Extension
Ornamental Plants plus Version 3.0 - 00001758
11/12/99
Spruce Needle Miner
The insect overwinters as a larva inside a mined out
needle. It emerges in the spring, feeds briefly and then
pupates. The adult moths emerge in May and June. The
female lays eggs at the base of a needle. The larvae
hatch out and enters a needle and mines it out. When
the needle is mined out the larva cuts it off and goes to
another. Feeding continues until the first frost.
The most obvious symptom is the browned, cut off needles
that are webbed to each other. Close examination of the
needles will reveal them to be hollowed out.
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This file was generated from data base ZZ on 01/19/00.
Data base ZZ was last revised on 11/12/99.
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