Orange tortrix—Argyrotaenia citrana
Tortrix larvae are greenish to bright yellow or pale straw colored with a golden head and shield on
the segment behind the head. Like other leafrollers, they feed inside webbed nests and, when disturbed,
wiggle and drop from a silken thread. This is a coastal pest only.
Identification of species
Caterpillars feed on leaves, often webbing them together; tender leaf growth and buds may also be eaten.
Caterpillars may feed on fruit, creating shallow scars that are unsightly and can be invaded by decay
organisms. Grapes or other berries may be webbed together and killed.
Destroy host weeds (e.g., mustard, filaree, cheeseweed),
mummified fruit, and trash at least a month before buds begin
to break. Hand-pick webbed leaves and larvae to help control
populations. Early harvest in grapes may eliminate some populations.
Natural enemies also feed on eggs and larvae.
For more information on leafrollers, see the Leafrollers on Ornamental and Fruit Trees Pest Note.
Damage to apricots