WASHINGTON (AP) -- The Supreme Court on Monday lifted a nationwide ban on the planting of genetically engineered alfalfa seeds, despite claims they might harm the environment.
In a 7-1 vote Monday, the court reversed a federal appeals court ruling that had prohibited Monsanto Co. from selling alfalfa seeds because are resistant to the popular weed killer Roundup.
The U.S. Agriculture Department must now decide whether to allow the genetically-modified seeds to be planted. It had earlier approved the seeds, but courts in California and Oregon said USDA did not look hard enough at whether the seeds would eventually share their genes with other crops.
"This Supreme Court ruling is important for every American farmer, not just alfalfa growers," said David F. Snively, Monsanto's senior vice president and general counsel. "All growers can rely on the expertise of USDA, and trust that future challenges to biotech approvals must now be based on scientific facts, not speculation."
A federal judge in San Francisco had barred the planting of genetically engineered alfalfa nationwide until the government could adequately study the crop's potential impact on organic and conventional varieties.
St. Louis-based Monsanto argued that the ban was too broad and was based on the assumption that their products were harmful. Opponents of the use of genetically engineered seeds say they can contaminate conventional crops, but Monsanto says such cross-pollination is unlikely.
"We agree that the District Court's injunction against planting went too far," said Justice Samuel Alito, who wrote the majority opinion.
Justice John Paul Stevens was the only justice to dissent. "It was reasonable for the court to conclude that planting could not go forward until more complete study ... showed that the known problem of gene flow could in reality be prevented," he said.
Alfalfa, which is used for livestock feed and can be planted in spring or fall, is a major crop grown on about 22 million acres in the U.S., Monsanto said in court papers. Monsanto's alfalfa is made from genetic material from bacteria that makes the crop resistant to Roundup.
Justice Stephen Breyer took no part in the case because his brother, U.S. District Judge Charles Breyer in San Francisco, issued the initial ruling against Monsanto.
The case is Monsanto v. Geerston Seed Farms, 09-475.