Home Fall Webworm.

The entire infested plant does not need to be treated.

Aug 17, Figure 3. Close-up of fall webworm larvae (Raymond Cloyd, KSU) Fall webworm caterpillars feed on a wide range of trees, including: birch, crabapple, maples, hickory, pecan, mulberry, and walnut. Fall webworm caterpillars, unlike caterpillars associated with the eastern tent caterpillar, Malacosoma americanum, remain within the enclosed webbing and do not venture out to feed. Caterpillars. Orchards sprayed to control pecan nut casebearer using molting disrupters in May to early-June seldom experience significant fall webworm infestation.

Fall webworm populations vary from year to year.

Handle carefully and store in original labeled containers out of the reach of children, pets, and livestock.

Several strategies and techniques are available to control this pest. Early detection is important when controlling heavy infestations of shrubcleanup.bar: Steve Upson. They are covered in long, white hairs. Fall webworms are native to the US and attack 90 different species of trees including pecan, hickory, persimmon, sourwood, walnut, beech, birch, cherry, and crabapple to name a few. These voracious caterpillars will eat the foliage, sometimes nearly defoliating the tree.