Is Bt cotton safe for soil organisms as the cotton plants degrade after harvest?
Impacts of Bt proteins have been investigated on a wide variety of terrestrial and aquatic invertebrates, including earthworms, collembola, daphnids, insect predators and parasites, spiders and honey bees.8 Even though test populations were exposed to levels 500 to 1,000 times greater than concentrations measured in the field, in most cases no adverse effects were observed.
