The Grocery Manufacturers Association has given $5 million to the campaign to defeat a Washington state ballot measure requiring labeling of genetically modified foods.
With the food industry trade group's donation Friday, opponents have now raised about $17.1 million to defeat Initiative 522. Supporters have raised about $4.7 million.
Campaign finance reports updated Monday show the Washington, D.C.-based food group is the top donor to the No on 522 campaign, followed by seed giant Monsanto. Dr. Bronner's Magic Soaps is the top contributor to the pro-labeling group.
Both sides have been running costly TV ads with weeks until the November election.
Supporters say consumers have a right to know whether food they buy contain genetically engineered ingredients. Opponents say the measure is confusing and costly.