title: [Insecticidal activity and active components of alcohol extract from Juglans mandshurica Maxim leaves].
abstract: The insecticidal active components in Juglans mandshurica Maxim leaves were extracted by conventional method. The alcohol extract and its chloroform-extraction phase showed insecticidal activities in contact toxicity and stomach toxicity against Lymantria dispar L. and Mamestra brassicae L. larvae. When the concentration of the extract was above 10 g x L(-1), the corrected mortality was higher than 50% 5 days after applying the extract. Alcohol extract had higher insecticidal activities than its chloroform-extraction phase. The GC-MS analysis on the active components in the chloroform-extraction phase showed that the main component was juglone (5-hydroxy-1,4-naphthalenedione), and the others were 2,2'-methylenebis-6-(1,1-dimethylethyl)-4-methyl-diphenol and 2-methoxy-4-vinylphenol.
authors.affiliation: College of Science, Northeast Forestry University, Harbin 150040, China. sunmolong@hotmail.com
authors.forename: Mo-Long
authors.initials: ML
authors.lastname: Sun
authors.forename: Zhan-Qian
authors.initials: ZQ
authors.lastname: Song
authors.forename: Gui-Zhen
authors.initials: GZ
authors.lastname: Fang
mesh_terms: D000818:Animals; D002725:Chloroform / Q000737:chemistry; D004305:Dose-Response Relationship, Drug; D000431:Ethanol / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D007306:Insecticides / Q000302:isolation & purification* / Q000633:toxicity; D031324:Juglans / Q000737:chemistry*; D007814:Larva / Q000187:drug effects / Q000254:growth & development; D009036:Moths / Q000254:growth & development; D009285:Naphthoquinones / Q000302:isolation & purification / Q000633:toxicity; D010936:Plant Extracts / Q000302:isolation & purification* / Q000633:toxicity; D018515:Plant Leaves / Q000737:chemistry*
chemical_list: D007306:Insecticides; D009285:Naphthoquinones; D010936:Plant Extracts; D000431:Ethanol; D002725:Chloroform; C005134:juglone