Genetically engineered (GE) crops can be protected from insect attack by producing dsRNA that lead to RNA interference (RNAi). This leads to the downregulation of ssential gene products in a herbivorous insect and represents a powerful new technology for pest control. The use of such GE plants, however, has raised concerns about their effects on valued non-target organisms. This risk is thus evaluated prior to the release of any RNAi-based transgenic plant into the environment. While the risk assessment follows the principles that have been shown to be effective for plants producing insecticidal proteins, e. g., Bt-transgenic plants, there are particularities about RNAi-based insecticidal plants that need to be considered.
