Effects of hemp seed oil and ascorbic acid on the total numbers of formed pupae and eclosed adults (a) and percentages of larval and pupal mortality (b) under chronic H2O2-induced oxidative stress. The hemp seed oil was applied to the H2O2-contained feeding medium at six concentrations (0 (S), 12.5, 18.7, 31.2, 62.5, and 125 μL/mL) and compared to an unstressed negative control (control-) and a positive control of ascorbic acid (ASC + S). All values are expressed as means ± SD. Different letters above the means represent significant differences between treatments separately for larvae, pupae, or eclosed adults (p < 0.05; LSD test).