Courtney said this was not a commercial threat for now but could become one if plantings spread further.
"So we are pursuing legal action - we are putting the blocks together to take civil action against some parties there," he said.
This case is believed to be breaking new ground in China, which has incurred repeated complaints about breaches of patents or copyright from many different countries.
"We will be one of the first to pursue plant variety rights in China," Courtney said.
"We will have to step our way through it ... but where we have had trademark infringements in China we have had support from the authorities to rein that back in, so we are comfortable that we have the right channels to talk to."
Zespri has already gone to court over this matter in New Zealand, seeking $70 million in damages against parties alleged to have breached its trademark. A verdict has not yet been reached in that case.
-RNZ