Fall Webworm

Fall Webworm Update

Fall Webworm has two generations per season in Ohio. The "fall" in the webworm's common name is based on the appearance of second generation nests late in the season. The first generation began to appear in southern Ohio in late May (see, "Spring, Summer, Fall Webworms," June 13, 2018) and second generation caterpillars are now on the scene.
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Authors
Joe Boggs

Redheads in Southwest Ohio

Southern and central Ohio do not appear to be experiencing an "outbreak" of our native fall webworm (Hyphantria cunea) this season.  However, I'm seeing some relatively high localized populations and this lead to a surprising discovery of red-headed webworms in southwest Ohio.
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Authors
Joe Boggs

Crazy Caterpillars Consuming Crabapples!

As Jim Chatfield and I wandered through the “Crablandia” plot evaluating and photographing crabapples today, we noticed multiple stages of the fall webworm munching on some of the foliage of the trees.  We first noticed the initial stages of the fall webworm caterpillars, which were small enough to have congregated on a single leaf.

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Authors
Erik Draper
Jim Chatfield

Fall Webworms in Spring?

First generation fall webworms (Hyphantria cunea) are appearing in central and southern Ohio.  Fall webworm moths typically have two generations per year in Ohio and despite their common name, first generation nests usually appear in late spring.  Fall webworm caterpillars only feed on the leaves that are enveloped by their silk nest.  As caterpillars grow in size, they expand their nest by casting silk over more leaves to accommodate their expanding appetites.

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Published on
Authors
Joe Boggs