Willow (Salix)-Fall webworm

Hyphantria cunea

Pest description and damage Large silken tents filled with caterpillars, frass and dead leaves, eventually engulf entire branches of deciduous trees including apple, cherry, peach, pecan, English walnut, black walnut, ash, boxelder, birch, chokecherry, elm, hickory, linden, poplar, sycamore, white oak and willow and some shrubs. Young caterpillars are pale greenish or yellow with a dark stripe down the back and a yellow stripe along the sides. Long silky hairs arise from yellow and black tubercles. When mature, the caterpillars are covered with rusty colored silky hairs. Adults are bright white with orange and black markings on the underside of the abdomen. Woolly scales cover masses of 200 to 500 greenish eggs.

For biology, life history, monitoring and management

See:

See "Caterpillar" in:

Management-chemical control

See Table 2 in: