-- The walkingstick attacks oaks and other species throughout the East.
Branches are killed or die back in heavily defoliated stands. Repeated
defoliation for several years can kill the trees. The insects create
a nuisance in high-use areas such as parks and recreation areas.
Insect (figure 9a). -- Nymphs and adults are slender and have long
thin legs and antennae. While motionless, they closely resemble twigs
of their host. Adults are about 2.5 to 3 inches (62-76 mm) long. Body
Injury (figure 9b). -- The entire leaf blade, except the base of
stout veins, is consumed. During heavy outbreaks, large stands are often
completely denuded. Trees may be defoliated twice during the same season.
-- Overwintering occurs in the egg stage, in leaf litter. Eggs hatch
in May and June. Nymphs reach adulthood during summer and fall. Females
deposit up to 150 eggs which are dropped randomly to the forest floor.
There is one generation per year in the South; 2 years are required
-- Natural controls are often effective. Chemical control is occasionally
needed in high-use areas.
Figure 9. -- (a)
Walkingstick adult; (b) forest stand defoliated by walkingsticks.