Subject: Fall Webworms
Location: near Villa Marie, Pennsylvania
August 12, 2013
Though there are numerous requests in our inbox, from the past few days as well as the accumulation of answered mail during our 2 1/2 weeks away from the office, we still feel compelled to post a few of our photos from the Ohio/Pennsylvania border area. Fall Webworms, Hyphantria cunea, create huge web nests to protect the caterpillars as they are developing. These webs are found on many species of trees in the Northeast. According to BugGuide they feed upon: “About 120 species of hardwood trees have been recorded as larval hosts
in the north, common hosts include alder, apple, ash, birch, Box-Elder (Acer negundo), cherry, elm, mulberry, poplar, willow
in the south, common hosts include ash, hickory, maple, mulberry, oak, pecan, poplar, redbud, sweetgum, walnut, willow; preferences for different host plant species appear to be regional and seasonal.”
This large web was on a nut tree. Upon closer inspection, tiny caterpillars could be spotted. They thrash about when their web is disturbed.