Laboratory evaluation of Melia azedarach (Meliaceae) extracts against the Elm Leaf Beetle (Coleoptera, Chrysomelidae)

G. VALLADARES .; M.T. DEFAGO; S. PALACIOS; M.C. CARPINELLA

JOURNAL OF ECONOMIC ENTOMOLOGY

ENTOMOLOGICAL SOC AMER

Lugar: Entomological Society of Anerica; Año: 1997 vol. 90 p. 747 - 750

0022-0493

In laboratory trials, treatment of elm leaves with an ethanolic extract of  Melia azedarach fruit of 2,5,10% concentration significantly deterred feeding by larvae and adults of the elm leaf beetle, Xanthogaleruca luteola (Muller). Larvae forced to feed on treated leaves died without molting; mortality also increase dramatically in adults fed on treated leaves. Survival and development of larvae sprayed with the extract also were negatively affected, but no effects were observed when adults were sprayed. the effects were generally independent of extract concentration within the range tested, except in the larval-spraying and adult-feeding choice tests, where the lowest dose had little or no significant effect