Insect Highlights

Insect Highlights for the Week of July 7, 2006.

Horsehair worm
Horsehair worm

HORSEHAIR WORMS

They are long- up to 14 inches and very skinny and often are seen after rains. They are called horsehair worms. They are not insects but are internal parasites of crickets, grasshoppers and other insects. They are harmless to people. For more information see http://www.inhs.uiuc.edu/inhsreports/mar-apr95/page4.html.

Horsehair worm
Horsehair worm

Garden symphylan
Garden symphylan

GARDEN SYMPHYLAN

This small centipede like creature is very uncommon in Wisconsin . It is a moderate pest in the Pacific Northwest . They feed on the roots and seedlings, and can prune root hairs. Plants are stunted and root crops have significant tuber damage. The symphylan can damage corn, mint, alfalfa, carrots, beets, potatoes and other vegetables. This sample was found in a cornfield at Arlington , Wisconsin .

Earwig damage
Earwig damage

EARWIGS

The damage to this daisy is caused by earwigs. They are fond of feeding on the flowers of many plants and I have had a large number of complaints this week. Treat soil and mulch areas for control; see http://cecommerce.uwex.edu/pdfs/A3640.PDF.

Gypsy moth
Gypsy moth

WORMS ON THE HOUSE

Gypsy moth caterpillars have 5 pairs of blue and 6 pairs of reddish dots. You can find them crawling on tree trunks, furniture, and buildings as they look for a place to pupate. It is too late to treat trees for damage. If you find large numbers you should consider using an oil spray on the eggs before next April. For more information, see http://s142412519.onlinehome.us/uw/pdfs/FR-171B.PDF or http://www.uwex.edu/ces/gypsymoth/homeowners.cfm.

dragonfly iconReturn to Entomology Home Page.
URL is http://www.entomologyl.wisc.edu/diaglab/06hilite/07_07.html. Updated July 13, 2006.

237 Russell Labs
1630 Linden Drive
Madison, WI 53706
608/262-3227

For more information contact: 
Phil Pellitteri, 608/262-6510
or e-mail Phil Pellitteri.