By RNZ
Zespri is pursuing legal action in China to stop the spread of pirated kiwifruit cuttings.
The company's Gold Three (G3) variety was developed after 10 years of work with Plant and Food Research and is a much valued strain of kiwifruit for the firm.
Zespri senior executive Dave Courtney said he first became aware of unauthorised plantings of G3 a few years ago,
It was now estimated 2500 hectares of illegal plants are under cultivation in China.