Kiwifruit Vine Health says a provisional test for the PSA-V vine disease from an orchard in the Whangarei region, came back positive.
The result, from a Hort16A vine in an orchard near Maungatapere is being verified and the result is expected on Friday.
If the result is positive, it will be the first time the disease has been found in the Whangarei region.
The disease was discovered in an orchard at Kerikeri last week.
KVH has established a provisional control area around the affected orchard which includes 32 orchards near Maungatapere.
A meeting will be held for Whangarei growers on Friday.