Christian Reith will miss Australian Derby day at Randwick after being suspended for careless riding at Rosehill.

Reith was outed for six meetings after pleading guilty to shifting out aboard Monton at the 100m mark of the Group Two Ajax Stakes in which his mount finished third.

He caused interference to Triple Elegance who was also taken out on to the second placegetter Riva De Lago.

Reith's suspension, his fifth in the past 12 months, will start after he rides on Golden Slipper day at Rosehill next Saturday.

He can return for Doncaster Day at Randwick in two weeks.

Stewards also fined James McDonald $400 for his salute before the winning post on It's A Dundeel, who won the Rosehill Guineas by 6-3/4 lengths.

Melbourne jockey Jamie Mott was suspended for seven meetings for careless riding aboard Sense Of Hite in the Magic Night Stakes.

His ban starts on April 2.