title: Fumigant activity of plant essential oils and components from horseradish (Armoracia rusticana), anise (Pimpinella anisum) and garlic (Allium sativum) oils against Lycoriella ingenua (Diptera: Sciaridae).
abstract: Plant essential oils from 40 plant species were tested for their insecticidal activities against larvae of Lycoriella ingénue (Dufour) using a fumigation bioassay. Good insecticidal activity against larvae of L. ingenua was achieved with essential oils of Chenopodium ambrosioides L., Eucalyptus globulus Labill, Eucalyptus smithii RT Baker, horseradish, anise and garlic at 10 and 5 microL L(-1) air. Horseradish, anise and garlic oils showed the most potent insecticidal activities among the plant essential oils. At 1.25 microL L(-1), horseradish, anise and garlic oils caused 100, 93.3 and 13.3% mortality, but at 0.625 microL L(-1) air this decreased to 3.3, 0 and 0% respectively. Analysis by gas chromatography-mass spectrometry led to the identification of one major compound from horseradish, and three each from anise and garlic oils. These seven compounds and m-anisaldehyde and o-anisaldehyde, two positional isomers of p-anisaldehyde, were tested individually for their insecticidal activities against larvae of L. ingenua. Allyl isothiocyanate was the most toxic, followed by trans-anethole, diallyl disulfide and p-anisaldehyde with LC(50) values of 0.15, 0.20, 0.87 and 1.47 microL L(-1) respectively.
authors.affiliation: Division of Forest Diseases and Insect Pests, Wood Chemistry and Microbiology, Korea Forest Research Institute, Seoul 130-012, Republic of Korea. parkik1@foa.go.kr
authors.forename: Ii-Kwon
authors.initials: IK
authors.lastname: Park
authors.forename: Kwang-Sik
authors.initials: KS
authors.lastname: Choi
authors.forename: Do-Hyung
authors.initials: DH
authors.lastname: Kim
authors.forename: In-Ho
authors.initials: IH
authors.lastname: Choi
authors.forename: Lee-Sun
authors.initials: LS
authors.lastname: Kim
authors.forename: Won-Chull
authors.initials: WC
authors.lastname: Bak
authors.forename: Joon-Weon
authors.initials: JW
authors.lastname: Choi
authors.forename: Sang-Chul
authors.initials: SC
authors.lastname: Shin
mesh_terms: D000818:Animals; D031215:Armoracia / Q000737:chemistry*; D004175:Diptera; D005737:Garlic / Q000737:chemistry*; D007306:Insecticides / Q000032:analysis*; D007814:Larva; D009822:Oils, Volatile / Q000737:chemistry; D028042:Pimpinella / Q000737:chemistry*; D010944:Plants / Q000737:chemistry
chemical_list: D007306:Insecticides; D009822:Oils, Volatile