Strawberry leafrollers (tortix), Ancylis comptana (Froelich)
Adults are small, bell-shaped tortricid moths that are rust-brown
color with markings of light yellow on the wings (see UC Davis
photo of adult http://www.ipm.ucdavis.edu/PMG/r734500311.html)
. Adults have a wing span of approximately 12 mm. The slender
are nearly 1/2 inch long when mature. Larvae are slender, have
green-brown bodies and reach just over 12 mm when fully grown.
Biology and damage:
Strawberry leafrollers are common pests in the eastern half of
United States. The insect has several, usually 2-3 generations per
year. Adults emerge in early April to May and deposit tny eggs on
foliage. Hatching occurs in about 1 wk, and the larvae complete
development in 40 to 59 days. Damage results from larvae feeding
leaves and rolling the leaves by means of silk webbing. Once
in the rolled leaf, larvae continue to feed. Some leafrollers may
consume whole leaf tissue. Leaf feeding results in reduced runner
formation, interference with ripening fruit, and plant kill.
Strawberries are quite tolerant of the leaf feeding species and
support high population levels without economic loss.
Virginia Commercial Small Fruit recommendations (html
Strawberry leafroller has a large complex of parasites that play
major role in lowering pest populations.
In areas with a chronic leafroller problem, it may be feasible
remove accumulated trash in spring around
the plants with either blowers or suction devices to limit the
potential for a large population buildup (UC-Davis).