Seasonal development
and life cycle—Hornworms
Damage by hornworm larvae is usually most common in
midsummer, but there may also be a small population
peak of larvae in the late summer. Infestations tend
to be more severe in warm inland areas. The
larval form is the only stage that causes damage. Eggs
are laid singly on leaves. Larvae feed, then burrow
into the soil to
pupate. The adult develops over the winter and emerges.
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