ANÁLISE FAUNÍSTICA E DIVERSIDADE DE INSETOS NÃO-ALVO EM SOJA BT COLETADOS POR ARMADILHAS MOERICKE

Abstract

In Brazil, information on the risk assessment of Bt crops in the non-target arthropod community is scarce, especially in the soybean crop, as it is a recent technology. In view of this fact, this study aimed to perform a faunal analysis to evaluate possible effects of Bt soybean (Cry1Ac) on the diversity of non-target insects collected by Moericke traps. The experiment was conducted in the field with two treatments, conventional soybean and Bt soybean. The collected insects were submitted to taxonomic identification at the level of order and faunal and diversity analysis. In total 1,272 insects were collected in Bt soybeans, being classified into 33 morphospecies. In the non-Bt soybean, a total of 1,004 insects were collected, classified into 30 morphospecies from six different taxonomic orders (Coleoptera, Diptera, Hemiptera, Hymenoptera, Lepdoptera and Thysanoptera). The faunal analysis selected as the most abundant and frequent in the Bt and non-Bt soybean areas the morphospecies: Col 05 (Coleoptera) and Dip 30 (Diptera). Of the morphospecies collected, Col 06, Hem 26 and Hym 73 were collected only in non-Bt soybean, while the morphospecies Dip 10, Hem 15, Hem 22, Hym 09 and Hym 52 were collected only in Bt soybean. In general, another morphospecies that stood out due to the abundance collected is the morphospecies Thy 01 (Thysanoptera). Of the total number of individuals collected in non-Bt soybeans, 68% belong to the order Thysanoptera, 16% belong to the order Coleoptera and 12% belong to the order Diptera. In Bt soybeans, the order Thysanoptera represents 58% of the total number of individuals collected, while Coleoptera and Diptera represent 23 and 15%, respectively. In the diversity analysis, there was no significant differences between Bt and non-Bt soybean treatments for any of the evaluated indices (abundance, richness, Pielou’s evennes, Shannon-Wiener and Simpson). With the results, it was concluded that Bt soybean expressing Cry1Ac does not alter the diversity of non-target insects collected by Moericke traps.

IF Goiano - Campus Rio Verde