Insecticide and antifeedant activity of different plant parts of Melia azedarach on Xanthogaleruca luteola.
In laboratory choice and no-choice bioassays, treatment of elm leaves with extracts obtained from unripe fruits and green or senescent leaves of Melia azedarach at 1-10% concentration significantly deterred feeding by adults of the elm leaf beetle, Xanthogaleruca luteola. Also, in no-choice tests, adults fed on leaves treated with 2, 5 or 10% extract showed a dramatic increase in mortality rates. Extracts from the different plant structures were similarly active, and starvation as a consequence of their strong antifeedant activity could play a significant role in the high mortality values observed.
Defagó
M
M
Centro de Investigaciones Entomológicas de Córdoba, FCEFYN, Universidad Nacional de Córdoba, Av. Vélez Sársfield 299, (X5000 JJC), Córdoba, Argentina. mdefago@yahoo.com.ar
Valladares
G
G
Banchio
E
E
Carpinella
C
C
Palacios
S
S
D000818:Animals; D001517:Coleoptera / Q000187:drug effects / Q000502:physiology*; D005247:Feeding Behavior / Q000187:drug effects*; D005638:Fruit; D007306:Insecticides / Q000008:administration & dosage / Q000494:pharmacology*; D031586:Melia azedarach; D010572:Pest Control, Biological; D008517:Phytotherapy; D010936:Plant Extracts / Q000008:administration & dosage / Q000494:pharmacology*; D018515:Plant Leaves
D007306:Insecticides; D010936:Plant Extracts