-- This insect sometimes defoliates many red and white oaks throughout
the East. Defoliation has been most severe along ridge tops where white
and chestnut oak frequently occur. Forest areas are often defoliated
for several consecutive years, killing many trees.
Insect (figure 10). -- Larvae are various shades of green about
1.2 inch (29 mm) long, and have black heads. At rest, the wings of the
adult appear bell shaped and are creamy brown and gray with a darker
Injury. -- The larvae either fold or roll individual leaves together,
forming an enclosure for protection and rest, when not feeding. Extensive
stands of trees may be completely defoliated, including the understory.
-- Overwintering eggs hatch in April and the young larvae begin rolling
the leaves and feeding. Feeding is complete by mid-June and pupation
occurs in cocoons within the rolled leaves or in bark crevices. Moths
emerge in late June or early July and deposit eggs in masses on the
trunk and branches.
-- Natural enemies are usually effective. Chemical controls may be needed
to protect high-value trees.
10. -- Oak leafroller larvae.