title: Effect of ursolic acid from epicuticular waxes of Jacaranda decurrens on Schizaphis graminum.
abstract: Ursolic acid from Jacaranda decurrens showed toxicity and feeding deterrency towards the greenbug Schizaphis graminum. Biological activity was determined by analyzing ursolic acid effects on the survival, reproductive index, and population growth rate of the greenbug. Survival and reproductive index decreased in direct proportion to ursolic acid content in the diet. The population growth rate decreased markedly when the aphids were fed on barley leaves sprayed with ursolic acid dissolved in DMSO, in comparison to leaves sprayed only with DMSO. The feeding behavior of the greenbug was also affected by ursolic acid. Ingestion time on diet with 0.1 mM was reduced about 30% in relation to the ingestion time on control diet.
authors.affiliation: Departamento Biologia, Universidade de São Paulo, Ribeirão Preto, Brasil.
authors.forename: E M
authors.initials: EM
authors.lastname: Varanda
authors.forename: G E
authors.initials: GE
authors.lastname: Zúñiga
authors.forename: A
authors.initials: A
authors.lastname: Salatino
authors.forename: N F
authors.initials: NF
authors.lastname: Roque
authors.forename: L J
authors.initials: LJ
authors.lastname: Corcuera
mesh_terms: D000818:Animals; D001042:Aphids / Q000502:physiology*; D001938:Brazil; D004121:Dimethyl Sulfoxide / Q000494:pharmacology; D005247:Feeding Behavior / Q000187:drug effects; D001467:Hordeum; D009758:Nymph; D010947:Plants, Toxic / Q000737:chemistry*; D011153:Population; D012098:Reproduction / Q000187:drug effects; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification / Q000633:toxicity*; D000097245:Ursolic Acid
chemical_list: D004121:Dimethyl Sulfoxide; D014315:Triterpenes; D000097245:Ursolic Acid