Phytophagous insects select for oviposition sites that improve offspring survival outcomes. Many woodboring insects, such as the invasive emerald ash borer (EAB), Agrilus planipennis , select for oviposition sites underneath bark crevices of host trees. Although the preference for rougher bark has been demonstrated, the limits of EAB oviposition site selection are unknown. Here we determined the effective bark crevice size tha...