Fall Webworm

Fall Webworm Update

This is the second posting on Fall Webworm this season. The first Alert posted on July 27 noted that fall webworm nests are late, but on the rise. However, several significant developments have occurred since that time.
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Authors
Joe Boggs

Fall Webworms Rise

Fall Webworm (Hyphantria cunea, family Erebidae) nests are becoming noticeable in southwest Ohio. Their arrival seemed to be unusually late this season until close inspections revealed the nests are housing the red-headed biotype. But more on that later.
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Authors
Joe Boggs

Fall Webworm Nests

Overwintered fall webworm (Hyphantria cunea) eggs have hatched in southwest Ohio and first-generation nests are becoming noticeable. Look for these hairy caterpillars inside small silk nests enveloping just a few leaves. The nests will rapidly expand over the next few weeks to include more leaves and become far more evident.
Published on
Authors
Joe Boggs

Spectacular Fall Webworm Nests

Fall Webworm (Hyphantria cunea) has two overlapping generations per season in Ohio. The "fall" in the webworm's common name is based on large second-generation nests normally appearing late in the season. However, we are receiving reports that where localized webworm populations are high, the caterpillars are already producing some truly spectacular nests sometimes enveloping entire trees.
Published on
Authors
Joe Boggs

Fall Webworm

Overwintered fall webworm (Hyphantria cunea) eggs are hatching and first-generation nests are appearing in southwest Ohio. Look for these hairy caterpillars inside small silk nests enveloping just a few leaves. The nests will rapidly expand over the next few weeks to include more leaves and become more evident.
Published on
Authors
Joe Boggs

Rise of Fall Webworms

First-generation nests of the deceptively named fall webworm (Hyphantria cunea) are now becoming evident in Ohio. This native moth has two generations per season in Ohio with the first-generation appearing once the overwintered eggs hatch.
Published on
Authors
Joe Boggs

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.
Published on
Authors
Joe Boggs