Kiwifruit Vine Health says more settled weather conditions are helping growers to manage the spread of the PSA vine disease in the Bay of Plenty.
Wet windy conditions are ideal for spreading the bacterial spores.
KVH chief executive John Burke says drier weather in the past few weeks following the early October storm, has been a factor in slowing the infection rate.
Test results confirmed a further 48 cases of the disease last week.
That brings the number of orchards with infected vines to about 840, mostly in the Te Puke district.
Most of the new cases were in the green variety.