This caterpillar is similar to the eastern tent caterpillar, commonly seen on cherry trees, but its tent is really a mat of silk threads that trace its path along limbs. Eggs are found on small twigs and appear as black shiny masses less than an inch long. Moths lay eggs over the entire height of trees. When the eggs hatch nine months later, the caterpillar larvae spread out to feed. When they are full grown, they leave the host tree and start to look for a place to spin a cocoon. The nuisance caterpillars are those on houses and in yards.

Homeowners can use a garden hose to wash caterpillars from houses and shrubs. A strong stream will often kill the caterpillars. An insecticide such as liquid Sevin will kill the caterpillars in a localized area. A band of Sevin dust will also keep caterpillars out of areas. Widespread use is just not practical.

Trees defoliated for three or four years may show declining growth and be susceptible to other insects and diseases, but generally will recover. Most trees can produce two crops of leaves. Trees defoliated should be fertilized in the winter to help their recovery.

DISCLAIMER: Recommendations for use of chemicals are included in this newsletter as a convenience to the reader. The use of brand names and any mention or listing of commercial products or services does not imply endorsement by the N.C. Cooperative Extension Service nor discrimination against similar products or services not mentioned. Individuals who use chemicals are responsible for ensuring that the intended use complies with current regulations and conforms to the product label. Be sure to obtain current information about usage and examine a current product label before applying any chemical.

Revised 2/16/2006.