Colorado potato beetle
Genetic research has produced several genetically modified varieties. 'New Leaf', owned by Monsanto Company, incorporates genes from "Bacillus thuringiensis", which confers resistance to the Colorado potato beetle; 'New Leaf Plus' and 'New Leaf Y', approved by US regulatory agencies during the 1990s, also include resistance to viruses. McDonald's, Burger King, Frito-Lay, and Procter &amp; Gamble announced they would not use genetically modified potatoes, and Monsanto published its intent to discontinue the line in March 2001.