Plant essential oils used in experiments included lemonscented gum Corymbia (Eucalyptus) citriodora, lemon-scented
ironbark Eucalyptus staigeriana, narrow-leaved peppermint
Eucalyptus radiata, broad-leaved peppermint Eucalyptus
dives, lemon-scented tea tree Leptospermum petersonii, peppermint Mentha piperita, honey myrtle Melaleuca teretifolia
and lemon Citrus limon. Vegetable oils were safflower
Carthamus tinctorius, cottonseed Gossypium herbaceum,
linseed Linum usitatissimum, palm Elaeis guineensis and neem
Azadirachta indica.All products were supplied by BioAust Pty
Ltd (Jimboomba, Qld).