ACEITE ESENCIAL DE PIPER CRASSINERVUM PARA EL CONTROL DE SITOPHILUS ZEAMAIS (COLEOPTERA: CURCULIONIDAE)

was evaluated the toxic and repellent effect of the essential oil of p. crassinervum on s. zeamais through methods of contact with grains, applying the product directly on to the grains using concentrations of 0,25; 0,5; 1,0; 2,0 and 4,0 ul/g, and contact in filter paper, applying the product on filter paper and subsequent infestation with adults using concentrations of 0,08; 0,17; 0,35; 1,70 and 1,41 ul/cm2. by the method of contact paper filter was obtained a cl50 and cl95 of 0,07 and 0,63 ul/cm2, respectively. when the toxicity of the oil at different concentrations evaluated was obtained a tl50 and tl95 of 58,62 and 72,86 h, respectively. by the method of contact with grains the cl50 and cl95 it was 3,99 and 0,72 ul/g product, respectively and the tl50 and tl95 was in 17,11 and 77,85 h, respectively. it was determined the effect of repellency of p. crassinervum, finding that a concentration of 2ul/g was presented the lowest value preference (13,1%). according to the results obtained, p. crassinervum presents toxic and repellent effect on s. zeamais.