Select nontarget arthropod abundance in transgenic and nontransgenic field crops in Ohio

Nontarget anthropod populations were monitored in both transgenic and nontransgenic corn and soybean fields in western and central Ohio, A total of 24 fields, 12 corn and 12 soybean. were inspected,weekly from late June through mid August, Half of the cornfields were Bacillus thuringiensis (Bt) hybrids and half of the soy bean fields were Roundup Ready (1111). Sweep net samples in soy bean fields and unbaited Pherocon AM yellow sticky traps in both soybean and cornfields where used to collect nontarget arthropods. Soil samples were also taken from all 24 fields to compare soil mite populations, A select group of 13 readily identifiable arthropods composed mainly of beneficial insects commonly found in held crops. were recorded in weekly sweep net and sticky trap samples for later analysis. Sweep net data from soybean fields revealed no significant differences in nontarget arthropods. Yellow sticky trap data from soybean and corn fields found significantly more green lacewing adults (Chrysopa spp.) in six pooled non-RR soybean fields. significantly more rove beetles it] one non-Bt cornfield, and significantly more Orius spp. in one Bt cornfield. There were care also significantly more soil inhabiting mites at one non-RR soybean field. Based oil the abundance of these arthropod populations in paired transgenic and nontransgenic fields, few negative effects on the 15 nontarget arthropods selected call be directly associated with transgenic soybean and corn crops in Ohio.