Cydia strobilella (Olethreutidae)
spruce seed moth
(Formerly C. youngana, formerly Laspeyresia youngana)
Larvae reach a maximum size of 10 mm. They are whitish with a dark head.
Eggs are laid in June on the cone scales of spruce flowers. Newly hatched
larvae mine directly to a seed and commence feeding. They move from seed
to seed until maturity (in September) when they move into the cone axis for
winter. Pupation occurs in May of the following year. There is no external
evidence of damage.
This species is a major pest of spruce.
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