Illegal plantings of New Zealand's high valued gold kiwifruit variety, Sun Gold, have almost doubled in the past six months in China.
Zespri owns the rights to Sun Gold, or G3, and growers here pay hundreds of thousands to dollars per hectare to grow it.
Six months ago the marketing organisation believed there were about 2500 hectares of unauthorised plantings in China. That has now climbed to 4000 hectares. (New Zealand has 7500 hectares of Sun Gold planted.)
A senior executive, Dave Courtney, said Zespri is watching the situation closely.