Chief steward Kim Kelly has warned apprentice Dylan Mo Hin-tung that he needs to lift his performance to avoid causing interference in races but the youngster had a few mates in the room on Sunday as careless riding continued to take a toll.

Four more careless riding suspensions were handed down, with Zac Purton, Alex Lai Hoi-wing and Ben So Tik-hung all copping a penalty but Kelly was sterner with the 10-pound claimer.

The chief steward pointed out to Mo that his two-day ban for causing trouble as he took Flying Moochi to the lead in the final race was already his third careless riding suspension in only 45 rides and that simply wasn’t good enough.

“Apprentice Mo was advised he needs to take remedial action before his careless riding record becomes a serious matter,” he said.

Lai and So were despatched to the benched list after a roughhouse opening race that saw severe interference inside the final 200m to both favourite Southern Express and second favourite Cheer Win as they were knocked out of the race and So pleaded guilty to being the culprit, resulting in a two-day ban.

Lai’s offence had been earlier in the race with his two-day stretch accompanied by a HK$10,000 fine.

Purton’s ban came out of the ninth race, where Prawn Baba checked Marvel Hero in the early stages and his two days on the sidelines will take in the December 14 and 17 meetings, post internationals.

Silvestre de Sousa returns this week from a careless riding ban but has another waiting in a fortnight, while Matthew Chadwick goes the other way after the midweek card and there are another four jockeys lined up to serve time including Nash Rawiller and Chad Schofield, who will both have most of December off.

Also from the stewards’ room, standby riders will be named for Kei Chiong Ka-kei’s bookings at Happy Valley on Wednesday after her fall at the track on Friday that required stitches in a hip and left her with general bruising.