An agribusiness professor says either the equipment being used detect dicyandiamide in New Zealand milk overseas is faulty - or agri-terrorists are deliberately sabotaging Fonterra's product.
Sri Lanka ordered Fonterra to recall 40 tonnes of milk powder after it said it found very high levels of DCD. But Fonterra says it tested the same product before it left the country and no DCD was found.
Waikato University professor of agribusiness Jacqueline Rowarth says something's clearly not right, and it's either faulty testing equipment or something far more sinister.
"I would be checking their machinery. I would be checking the system that they're using and I would be trying to trace from source, because it is possible that chemicals arrive from places that are ... not New Zealand, as in insertion, contamination, agri-terrorism."
"Has something been added? Have they got a misunderstanding in the calibration of their machine?"
Professor Rowarth said she could not see how the DCD could have come from a New Zealand farm at the levels Sri Lanka said it had detected and questioned whether it was a move by Sri Lanka to protect its domestic market.