Efficacy of Spray Formulations Containing Binary Mixtures of Clove and Eucalyptus Oils Against Susceptible and Pyrethroid/ Malathion-Resistant Head Lice (Anoplura: Pediculidae)

摘要: The control efficacy of clove, Eugenia caryophyllata, and eucalyptus, Eucalyptus globulus, essential oils 15 formulations containing these alone (8, 12, 15% sprays) their binary mixtures (7:3, 5:5, 3:7 by weight) against adult females insecticide-susceptible KR-HL dual malathion- permethrin-resistant BR-HL strains head louse, Pediculus humanus capitis (De Geer), was examined using contact plus fumigant human hair wig (placed over the mannequin) mortality bioassays. In bioassay, from eucalyptus (0.225 mg/cm2) clove (1.149 were less effective than either d-phenothrin (0.0029 or pyrethrum (0.0025 based on 6-h median lethal concentration values. However, efficacies almost identical fromn both strains, despite high levels resistance to (resistance ratio, 667) 754). oil spray treatment gave better with mixtures. Thus, applied as 8% sprays (15 20 ml) appears provide protection pediculosis even insecticide-resistant louse populations. Once safety issues resolved, covering treated scalp bath shower cap hat would ensure action oil.