Drugs found in SA man's car and house

An Adelaide man has been charged with drug trafficking after a routine traffic stop led police to drugs in his car and home.

Police say they stopped a car in Devon Park late on Sunday as it was weaving suspiciously through backstreets and found eight grams of a substance believed to be methaphetamine in the vehicle.

They went on to search the 23-year-old Prospect man's home where they allegedly found three cannabis plants, some dried cannabis, more methaphetamine and a taser.