Observations on the Biology of Four Species of Dioryctria in North Carolina (Lepidoptera: Phycitidae)1

Abstract

In North Carolina, Dioryctria amatella (Hulst) is injurious to long-leaf pine (Pinus palustris L.) and loblolly pine (P. taeda L.); D. disclusa (Heinrich) feeds upon long-leaf pine, loblolly pine, and scrub pine (P. virginiana Mill.); and I), zimmermani (Grote) and D. clarioralis (Walker) occur on loblolly pine. D. amatella produces several generations each year; the other 3 species of Dioryctria are univoltine. Parasites associated with D. amatella include Exochus turgidus Holmgren, Bracon sp., Macrocentrus sp., and at least 2 species of Diptera. D. zimmermani is parasitized by Hyssopus rhyacioniae Gahan, and D. disclusa by Met corns tetralophae Muesebeck and Apanteles sp.