Bayer AG shares fell by 14% at the start of the week, following a San Francisco jury’s verdict that exposure to Monsanto’s Roundup caused Non-Hodgkin lymphoma in 46-year-old Dewayne Johnson while he worked as a groundskeeper.

The jury awarded $39.2m compensatory damages and $250m punitive damages for “failing to warn consumers that exposure to Roundup weed killer causes cancer”, reported Baum Hedland, one of Johnson’s three firms of attorneys.