Biological Effects and Toxicokinetics of DIM BOA in Diadegma terebrans (Hymenoptera: Ichneumonidae), an Endoparasitoid of Ostrinia nubilalis (Lepidoptera: Pyralidae)

2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA), the major hydroxamic acid present in corn, was tested for its effect on the endoparasitoid of Ostrinia nubilalis (Hübner), Diadegma terebrans (Gravenhorst). The compound was fed to O. nubilalis (0.3 mg DIMBOA/g diet), and the response of the parasitoid was measured in terms of development time and weight and mortality at the pupal and adult stages. DIMBOA increased mean time to pupation and …