Gypsy Moth Life Cycle
First instar larvae (caterpillars) hatch in the spring
from eggs laid the previous summer.
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Newly hatched larvae hang by silken threads, are caught
by the wind, and thereby disperse to other trees in the forest.
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Small larvae begin feeding on newly expanded leaves.
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Larvae go through 5 to 6 larval stages (instars). Between
stages they molt by shedding their skin.
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Larvae feed during the night and rest in bark crevices during
the day (except at high densities, feeding occurs all day).
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Pupation occurs about 8 weeks after egg hatch.
Pupae are usually located in bark crevices or other cyrptic
locations.
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The male moth has plumose antennae to detect the
sex pheromone emitted by the female.
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After mating, the female lays eggs in a single mass covered with
hairs from the abdomen. Most egg masses are located on
tree trunks. The winter is spent in the egg stage.
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Return to Gypsy Moth in NA
Last modified 10-29-03 by Sandy Liebhold .
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