Strong is the Seed (1949)

English scientist William Farrer, on health trip to Australia, advises his friends to invest money in wheat farming. In a hotel in Queanbeyan, Farrer hears that rust is playing havoc with farmers' crops, and his friends, who were ruined, have both just committed suicide. Searching for a cure for rust, Farrer meets Nina De Salis, daughter of a politician.

Unfortunately the movie Strong is the Seed is not yet available on HBO Max.