A Western Bay farmer says a threat to contaminate infant formula with 1080 is economic sabotage.
Federated Farmers received anonymous letters in November containing small packages of milk powder, which later tested positive for a concentrated form of 1080, police revealed this afternoon.
The letters carried a threat to contaminate formula with 1080 unless New Zealand stopped using the poison for pest control by the end of March.
Federated Farmers Bay of Plenty vice president and dairy farmer John Scrimgeour said the ploy to use 1080 was "sabotage in an economic sense'' and would generate fear among customers.
"In my view it is totally irresponsible for those opposed to 1080 to use this ploy. 1080 was based on a natural product an is occurring in minute cases even in our standard cup of tea and it's not as scary or as bad a substance a lot of people would have you believe.