AFPThe Bulls outscored the home side by two tries to one but Carter kept the scoreboard ticking over, punishing the South Africans for conceding a string of penalties in Christchurch.
Zac Guildford scored the Crusaders' only try midway through the first half and the Bulls had left themselves with too much to do by the time Dewald Potgieter and Wynand Olivier touched down in the last 18 minutes.
Last year's runners-up head into next weekend's semi-finals bidding to keep alive their chances of adding to their record seven titles
REDS 17-30 SHARKS
The Sharks blew away the Queensland Reds to reach the Super Rugby semi-finals with a 30-17 win at Lang Park on Saturday.
The Bulls outscored the home side by two tries to one but Carter kept the scoreboard ticking over, punishing the South Africans for conceding a string of penalties in Christchurch.
Zac Guildford scored the Crusaders' only try midway through the first half and the Bulls had left themselves with too much to do by the time Dewald Potgieter and Wynand Olivier touched down in the last 18 minutes.
Last year's runners-up head into next weekend's semi-finals bidding to keep alive their chances of adding to their record seven titles.
