US biotech giant Monsanto has said it has filed suit against Swiss-based rival Syngenta for alleged infringement of Monsanto’s patent covering the technique used in producing glyphosate-tolerant plants, including the GA21 glyphosate-tolerance trait in corn.

Filed in the US District Court in Wilmington, Delaware, Monsanto’s suit requests a permanent injunction against Syngenta to prevent the commercial sale in the US of any Syngenta corn that uses Monsanto’s patented technology.

“Monsanto has clear intellectual property rights that have been infringed by Syngenta’s use of GA21 corn as a part of its commercial strategy in the United States,” said Tom DeGroot, associate general counsel for Monsanto.

Syngenta announced this week that it had purchased GA21 glyphosate tolerance technology for corn from Bayer CropScience.