Kojonup farm owner Steve Marsh confirmed to AAP on Monday that his yields may have been compromised with GM canola and a notice was sent to him by the WA government. As result, the WA government was forced to revoke Marsh’s organic certification [...] WA Agriculture Minister Terry Redman has advised Marsh to bring his case before NASAA, suggesting that the association’s zero tolerance for GM contaminants could be adjusted in light of the European Union’s recent decision to implement 0.9 percent threshold for non-deliberate GM contamination of organic crops.