Forest Pests: Insects, Diseases & Other Damage Agents

Transverse-banded Looper (Hydriomena divisaria)

Maier, C.T., C.R. Lemmon, J.M. Fengler, D.F. Schweitzer, and R.C. Reardon. 2004. Caterpillars on the Foliage of Conifers in the Northeastern United States. FHTET-2004-1. Morgantown, WV: USDA Forest Service, Forest Health Technology Enterprise Team; 151 p.

Description. Dull yellow body with dorsal rectangular spots and broad, broken supraspiracular stripe. Orange-brown head with light brown on lobes. Brownish and greenish gray middorsal stripe expanded posteriorly into rectangular patch, especially on A1 to A7. Pinkish brown supraspiracular stripe; narrower, indistinct subspiracular stripe of variable color; black spiracles. Up to 25 mm.

Food. Balsam fir, eastern hemlock, eastern larch, spruces, and doubtfully pines.

Life Cycle. One generation. Pupa overwinters in soil or debris. Mature caterpillar present from August to November.

Comments. The transverse-banded looper occupies a very loose shelter of silk at its site of feeding.

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