Glen Boss has dedicated his win aboard Lucky Hussler at Caulfield to Caitlin Forrest, the South Australian apprentice who died this week from injuries suffered in a race fall.

Riders in Saturday's Group Three Moonga Stakes (1400m) wore blue armbands in memory of Forrest and Queensland jockey Carly-Mae Pye who also lost her life in a fall.

Pye died this week from injuries she suffered when a horse she was riding in a jump-out at Rockhampton on Monday broke down.

Boss had worked with 19-year-old Forrest having been invited to talk to the South Australian apprentices, something he has done on a number of occasions.

"That one is for Caitlin," Boss said.

"I had a bit to do with this beautiful young woman.

"She could've been a great athlete in our industry and to be taken like that is very painful."

Boss guided the Darren Weir-trained Lucky Hussler to a convincing 3-1/4-length win in Saturday's Moonga Stakes with Weir believing the addition of blinkers was the key to the gelding's victory.

It was Lucky Hussler's first win since joining Weir's team this campaign and earned him a shot at the Group One Emirates Stakes (1600m) at Flemington.

Boss settled the five-year-old just worse than midfield in a three-wide trail and worked into the race at the right time before putting his rivals away quickly in the straight.

He defeated Under The Louvre with a length to Generalife third.

"He deserves to have a crack at The Emirates Stakes the way he went today," Weir said.

"He's a horse in really good order."