There are claims the Ministry of Primary Industries has let farmers down when it comes to Mycoplasma bovis.
Cattle are being culled on farms around New Zealand at a rate biosecurity officials say is beyond expectations.
The number of farms under regulatory control has jumped from 130 to 290 in less than a week.
Koru Biosecurity Management Owner Jack Craw told Mike Hosking he believes MPI didn't pick up on the disease early enough and it's proving detrimental.
"You have only got to listen to what farmers are saying right now, they are just not getting the responses they needed. It seems MPI thought it would go away if they said nothing and now, of course, we are talking 300 farms."
LISTEN ABOVE AS JACK CRAW SPEAKS WITH MIKE HOSKING