BIOACTIVITY OF CRUDE EXTRACTS OF FIVE PLANTS OF THE SEMIARID PAMPAS AGAINST Tribolium castanueum HERBST

CORA JOFRE, F.; PERALRA, M. P.; MANZANO, S.; PATTACINI, S. H.; MARTINEZ, O.; BELLOZAS REINHARD, M. E.; SCOLES, G. E.

Potrero de los Funes

Congreso; XXX Reunión Científica Anual de la Sociedad de Biología de Cuyo; 2012

Sociedad de Biología de Cuyo

Repellent effect of chloroform-ethanolic and hexanic extracts from aerial parts of Ambrosia tenuifolia, Baccharis articulata, Urtica urens, Clematis montevidensis and Euphorbia dentata were evaluated against Tribolium castanueum larvae and adults. Repellency in larvae was evaluated by bioassays on treated diet with extracts (dose 0.04%). Repellent activity was evaluated at twenty four hours in larvae. Repellency test, in adults were performed using filter-paper circles cut in halves. The extracts, were applied on each half at a concentration of 0.31 mg.cm-2. Porcentual repellency (PR) was determinated for each extracts. The chloroform-ethanolic extract of B. articulata induced larvae repellency when the extracts were mixed in the diet followed by the hexanic extract of A. tenuifolia. Six extracts showed attractancy against T. castaneum larvae. A moderate repellent effect of B. articulata and Urtica urens extracts and hexane extract of A. tenuifolia on T. castaneum adults was observed; the hexane extract of C. montevidensis was the one with stronger repellency (class IV).