Riviera Farms and Victoria Health have confirmed the spinach was contaminated with a weed called thornapple, known by the scientific name of datura stramonium.
“The investigations have not identified any other potential chemical, herbicide or other type of contaminant,” a Riviera Farms spokesperson said.
”No other Riviera Farms produce have been impacted by this weed.”
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The company said neighbouring crops of spinach are in the process of being destroyed as a precautionary measure.
“Riviera Farms is continuing to conduct our own independent audit of the farm and weed which will inform our application to obtain recertification and recommence production.”
The discovery triggered recalls of several spinach varieties across Australia.