Head coach Colin Batch said it was pleasing to put together a solid performance in a game played under blistering 37 degree heat.
"Today was probably the hottest it's been, and certainly worse than our game yesterday and that shows a lot about our conditioning and being able to cope in very draining conditions," he said.
"We got the result we needed, so now the pressure goes on the other teams who still have games to play in the race to the final.
"It was nice to play from a goal in front and our ball possession and defence was good enough to play out those final 15 minutes."
Both sides battled under tough conditions with the heat in first half while scoring chances proved few and far between.
The Black Sticks capitalised on their first penalty corner of the match in the 28th minute when Russell's strong flick picked up a touch from a defender's stick and crashed into the goal.
Six minutes into the third quarter India found an equalising goal after Mandeep Singh deflected a hard pass past goalkeeper Kyle Pontifex.
But the Black Sticks fought back and took the lead once more in the 41st minute when a loose ball fell for Wilson who smashed the ball home from close range.
With a bye on the final day of round robin, New Zealand face a three day layoff with other results set to dictate whether they will contest the final or bronze medal match.
BLACK STICKS 2: (Kane Russell, Nick Wilson)
INDIA 1: (Mandeep Singh)
Halftime: Black Sticks 1-0