# An environmental risk assessment of maize containing event, DP-Ø51291–2, with activity against corn rootworms (Diabrotica spp.) via expression of the protein, IPD072Aa

## TL;DR

This study assesses the environmental safety of a genetically modified maize variety designed to control corn rootworms by expressing a specific protein.

## Contribution

The study provides a comprehensive environmental risk assessment of maize event DP-Ø51291–2 and its expressed protein IPD072Aa.

## Key findings

- The IPD072Aa protein is unlikely to pose significant risks to non-target organisms based on laboratory and field studies.
- Margins of exposure indicated negligible potential risk to non-target organism populations.
- Field assessments confirmed no unreasonable adverse effects from cultivating DP-Ø51291–2 maize.

## Abstract

Maize event DP-Ø51291–2 expresses the protein, IPD072Aa, which is derived from Pseudomonas chlororaphis, encoded by the ipd072Aa gene, to provide corn rootworm control. An environmental risk assessment was conducted for DP-Ø51291–2 maize which characterized potential exposure and hazard of the IPD072Aa protein to non-target organisms (NTOs). To estimate potential exposure to the IPD072Aa protein, worst-case estimated environmental concentrations (EECs) and refined EECs, where applicable, were calculated. To characterize potential hazard from the IPD072Aa protein, laboratory dietary toxicity studies were conducted with surrogate NTOs representing functional groups selected via problem formulation. Margins of exposure for each surrogate species were determined by comparing hazard and exposure values which indicated negligible potential risk to NTO populations. To add an additional line of evidence, a field assessment was conducted for DP-Ø51291–2 maize as compared to a near isoline control. Overall, no unreasonable adverse effects to NTO populations are anticipated from DP-Ø51291–2 maize cultivation.