A lawyer on Tuesday asked a San Francisco jury to award $412 million to a former school groundskeeper who claimed he was diagnosed with terminal cancer after using Monsanto Co.’s weed killer.

The trial, which began July 9, is the first to allege Monsanto Co.’s Roundup caused cancer. A San Francisco Superior Court jury is set to start deliberations on Wednesday.

San Francisco Jurors Hear Hours of Scientific Data About Herbicide’s Link to Cancer