that Eucalyptus globulus essential oil inhibited 99.3% egg hatching and 98.7% larval development at concentrations of 21.75 and 43.5mgml−1 (Macedo et al., 2009).
Ocimum gratissimum essential oil inhibited 100% egg hatching at concentration of 50mgml−1 (Pessoa et al., 2002). Croton zehntneri and Lippia sidoides essential oils inhibited 99.2
and 94.5% larval development of H.contortus at concentration of 10 and 20mgml−1 (Camurc¸ a-Vasconcelos et al.,2007).