A new study published and conducted by researchers from Switzerland, Czech
Republic, and China confirms that the individual Cry proteins in SmartStax
maize do not harm non-target species that are non-sensitive to the
individual proteins. This is the first study that investigated the impact of
SmartStax maize (expressing 6 different Bt Cry proteins to control pest
Lepidoptera and Coleoptera) on non-target arthropod predators.

Arthropods are exposed to GE crops with stacked insecticidal traits from
multiple Cry proteins from Bacillus thuringiensis (Bt). The research team
followed the flow of different Cry proteins through the foodweb (from plant
to herbivore to predator) and conducted feeding bioassays. They found that
three predators (lacewing, ladybird, and spider) are not affected by
SmartStax maize.

[rspb.royalsocietypublishing.org]