Noted in the greenkeeper's diary: "Very strange brown patches with footprints all over the green. Strange very strange."
As the damage has revealed itself over the last few weeks it seems at least two people were involved as there are two different sized footprints.
He estimates it will cost more than $2000 to fix, leaving the club well out of pocket.
The club's greenkeeper for the last 12 years Bill Burgess has spent hundreds of hours working on the green to make it one of the best bowling surfaces in Northland. He returned from a holiday in the South Island to the news the green had been vandalised.
"It's simple if you don't have a green you don't have a club," Mr Burgess said.
A special type of grass was required for the green and was not cheap. Mr Burgess started repair work on the green this week. He said it was difficult to tell how deep the herbicide had penetrated so it would be difficult to tell just how well the green would recover.
As black spots revealed themselves Mr Burgess was racking off the top soil, sweeping it away and re-grassing.
Police had been notified and had been to the club to photograph the damage.