Resumo

SALGADO D., Natalia; D'ANTONINO FARONI, Lêda Rita  e  SOTO G., Alberto. ESSENTIAL OIL OF PIPER CRASSINERVUM TO CONTROL OF SITOPHILUS ZEAMAIS (COLEOPTERA: CURCULIONIDAE). Bol. Cient. Mus. Hist. Nat. Univ. Caldas [online]. 2012, vol.16, n.1, pp.99-107. ISSN 0123-3068.

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.

Palavras-chave : toxic effect; maize weevil; stored grain; alternative products.

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