Bioatividade de óleos vegetais sobre o comportamento da saúva do nordeste (Atta opaciceps Borgmeier, 1939)

Abstract

The insects are the man's largest competitors for the hegemony of the earth. This research aimed to investigate the activity of six vegetable oils in the behavior of the northeastern leafcutting ant, Alta opaciceps Borgmeier, 1939. Colonies of Atinários of Experimentação Fitossanitária's Nucleus (NUCLEF), of the Center of Agrarian Sciences of the Federal University of Ceará, campus of Pici, sito in Fortaleza, Ceará, Brazil. The vegetable oils of jaborandi (Pilocarpu.s microphyllus Stapf.; Rutaceae), and its chemical representative 2-tridecanona; eucalyptus (Eucaliptus citriodora Hook.; Mirtaceae), representatives chemical citronelol and citronelal; alecrim pepper (Lippia aff. sidoides Cham.; Verbenaceae) and NIM (Azadirachta indica A. Juss; Meliaceae) used in the research they were supplied by the Department of Organic and Inorganic Chemistry of the Center of Sciences of the Federal University of Ceará (UFC). The solvent constituted by etanol (CH3CH2OH), acetone ((CH3)2CO) and distilled water, after its elaboration, it was mixed immediately to the oil to be tested. The mixture (oil + solvent) it was placed, separately, in each filter paper with the aid of a graduate pipette in the dosagens of 0,00 ppm (DO); 0,25 ppm (Dl); 0,50 ppm (D2); 1,00 ppm (D3) and 2,00 ppm (D4). The evaluation of the behavior of the rehearsed insects was obtained in function of seven types of answers that integrated the cast of observations: total movement (MT); access to the provision area (AAP); access to the filter paper (APF); territory demarcation in the provision area (MTAP); territory demarcation in the filter paper (MTPF); exploration of the provision area (EAP) and identification of the incentive sources (IFE). they were logged, also, referring data to the values of "garden fúngico". in cm3, during the seven subsequent days to the rehearsals. The used experimental delineamento was it blocks casualizados in an outline fatorial 6x5x 10 for the variable access to the filter paper (APF) and territory demarcation in the filter paper (MTPF) and 6x4x10 for the others. To the variable "garden fúngico" the delineamento was maybe used in blocks (10x5). The averages were tested to the level fiducial of 1% being used the test of Tukey. The association degree among the variables in study was measured through correlation of Pearson. Among the tested oils, the one of rosemary pepper (Lippia aff. sidoides Cham.) and 2-tridecanona, chemical representative of the oil by jaborandi (Pilocarpus rnicrophyllus Stapf.), they stood out for the investigated variables. These same oils also sketched significant effects for the volume of the "garden fúngico". With one generality manner, both possess bioatividade about the behavior of the sauva of the northeast provoked repellence in insect.