New Delhi, Oct. 30 -- Bayer has won its first trial over claims that its Roundup weedkiller causes cancer since a US Supreme Court ruling limited the legal arguments available to plaintiffs, potentially strengthening the German company's position in thousands of pending lawsuits.

A St. Louis jury unanimously ruled in favour of Bayer-owned Monsanto on Thursday in a case brought by three women who alleged that regular use of Roundup caused them to develop non-Hodgkin lymphoma. The verdict marks the first test of the continued viability of Roundup lawsuits following the Supreme Court's June ruling.

The outcome could have implications for around 65,000 claims Bayer faces in US state and federal courts from people who say they developed canc...