title: Bioactivity of extracts and isolated compounds from Vitex polygama (Verbenaceae) and Siphoneugena densiflora (Myrtaceae) against Spodoptera frugiperda (Lepidoptera: Noctuidae).
abstract: The effects of crude extracts, fractions and isolated compounds from Vitex polygama Cham. and Siphoneugena densiflora Berg were evaluated on the development of Spodoptera frugiperda JE Smith, a destructive insect pest of corn and several other crops. The extracts and fractions were incorporated into an artificial diet at 1 mg g(-1) and offered to the insect during its larval stage. Length and viability of larval and pupal stages as well as pupal weight were assessed. Isolated compounds were tested through superficial contamination of the diet at 0.1 mg g(-1). Weight and viability of ten-day-old larvae were determined. Methanolic and hydroalcoholic S. densiflora extracts caused 100% larval mortality, while leaf and fruit hydroalcoholic extracts from V. polygama were the most active. Among the isolated compounds, flavonoids presented the best insecticidal results, and tannins the best larval growth inhibition.
authors.affiliation: Departamento de Química, Universidade Federal de São Carlos (UFSCar), CP 676, 13565-905, São Carlos-SP, Brazil. marejor@uol.com.br
authors.forename: Margareth B C
authors.initials: MB
authors.lastname: Gallo
authors.forename: Waldireny C
authors.initials: WC
authors.lastname: Rocha
authors.forename: Uemerson S
authors.initials: US
authors.lastname: da Cunha
authors.forename: Fernanda A
authors.initials: FA
authors.lastname: Diogo
authors.forename: Fernando C
authors.initials: FC
authors.lastname: da Silva
authors.forename: Paulo C
authors.initials: PC
authors.lastname: Vieira
authors.forename: José D
authors.initials: JD
authors.lastname: Vendramim
authors.forename: João B
authors.initials: JB
authors.lastname: Fernandes
authors.forename: M Fátima das G F
authors.initials: MF
authors.lastname: da Silva
authors.forename: Luciane G
authors.initials: LG
authors.lastname: Batista-Pereira
mesh_terms: D000818:Animals; D007306:Insecticides / Q000032:analysis*; D007814:Larva; D027822:Myrtaceae / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry*; D018411:Spodoptera; D020950:Vitex / Q000737:chemistry*
chemical_list: D007306:Insecticides; D010936:Plant Extracts