NSW centre Morgan Turinui has targeted Bulls centre and 'talisman' Ettienne Botha as the man his side has to negate in Saturday's Super 12 rugby semi-final.

Wallaby back Turinui claimed NSW had the most consistent forward pack in the competition, but said the Waratahs' one weakness at the moment was their back play.

He said if the Waratahs backs can improve to support their superb forwards it will go a long way to determining Saturday's result.

"I just think as a unit, the backs can pick it up a little bit," Turinui said.

"The plays we've been doing, we've been practising for a long time, we should have them down pat, so we really need to get the execution right in the games.

"Little specific things like running lines and timing on the ball, and pass accuracy are the difference between a clean break and a half break where you are tackled.

"There's only going to be probably four, five, six scoring opportunities in the game this weekend and we can't afford to miss one because of a bad pass or a missed running line.

"We need to be more accurate and ruthless in our execution. We're getting a lot of good ball from the forwards, so we need to repay them by using it well."

The Bulls tally of 36 tries is the third best in the competition, just two behind NSW.

Almost two-thirds of the Bulls tries have been scored by just three men, wingers Bryan Habana (nine) and Akona Ndungane (seven) and inside centre Botha (six).

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