Second generation larvae are usually present from late July through late September. As larvae mature, they crawl down the tree and spend the winter as pupa in the leaf litter under the tree. The first generation is often small and usually goes unnoticed. The second generation is much larger and more noticeable. This insect is present more often on trees that are not surrounded by other trees.
Infestations are more common in eastern and southern Kansas.
High populations of fall webworm can completely defoliate host plants but do not kill them. However, on pecan trees, nut production and quality can be reduced if webworms are not controlled. On ornamental plants, control is optional. Pruning and destroying the infested portions of branches is a common control practice while webs are still small. Also, a stick or pole with a nail inserted crosswise can be used to snag individual webs.