Eucalyptus staigeriana (Lemon-scented Ironbark) produces a citrus-profile oil dominated by citral (geranial + neral), limonene, and 1,8-cineole — a composition atypical for the genus and responsible for its distinct lemon character. The essential oil has demonstrated in vitro and in vivo anthelmintic activity, inhibiting 99.27% of Haemonchus contortus egg hatching at 1.35 mg/mL and achieving 76.57% efficacy against gastrointestinal nematodes in goats at day 15 post-treatment.^[1]