McDonald's responded with the following statement:
McDonald’s has a long history of working with our suppliers to make our potato supply chain more sustainable, and we regularly engage in dialogue with them about their sustainability efforts, including those related to pesticides.
We know that our U.S. potato suppliers are already working with their growers to advance sustainable pesticide practices, such as reductions and alternative methods. We agreed to conduct a survey in 2009 to more formally summarize those practices, and we will share the key findings from that survey with our global potato suppliers, as well as make them available on our Corporate Social Responsibility website.
This process will further support the work McDonald’s continues to do to advance our vision for a sustainable supply chain.