INSECTICIDAL AND TOXIX EFFECTS OF EXTRACTS FROM ELEPHANTOPUS MOLLIS AND AZORELLA COMPACTA ON SPODOPTERA FRUGIPERDA LARVAE

SOSA ANDREA MABEL; COSTA MARIO GABRIEL; SOMAINI GABRIELA; VERA NANCY ROXANA; BARDÓN ALICIA DEL VALLE; BORKOSKY SUSANA ALICIA

BIOCELL

INST HISTOL EMBRIOL-CONICET

Lugar: Mendoza; Año: 2010 vol. 34 p. 118 - 118

0327-9545

The polyphagous S. frugiperda is a major insect pest of stored grains worldwide. As with most insect pests, control is usually attempted by means of synthetic insecticides. The application of synthetic insecticides holds special risks since most of them are not very selective. Continuing with our search for botanical pesticides derived from plants, we conducted experiments to investigate the feeding behavior (choice test) as well as the toxic effects on S. frugiperda larvae produced by the chloroformic extracts from A. compacta (AcE) and E. mollis (EmE). The extracts were added at 300 and 200 μg/ gram of diet. We observed 66% and 45% feeding deterrence at doses of 300 and 200 μg respectively for AcE. EmE caused 30% pupal mortality. Adults which survived showed a high percentage of malformations. These extracts would be a suitable natural source of insecticidal principles to be applied in agrochemical formulations.