Specialists are calling for a ban on paraquat; a commonly used herbicide linked to Parkinson’s disease. 

Leading neurologists and movement disorder experts have made an appeal to the Australian Pesticides and Veterinary Medicines Authority (APVMA) as the agency nears the end of its 27-year review of the chemical.

The call for action has gathered support from over 40 clinical neurology professionals. 

Their submission aligns with those made by other medical experts and organisations, including the Movement Disorder Society of Australia and New Zealand (MDSANZ), which described paraquat's continued use as a “critical public health issue”. 

MDSANZ says that the evidence linking paraquat to Parkinson’s disease “warrants immediate action” to protect public health.

The APVMA’s ongoing review, which has considered paraquat’s safety since 1997, recommended tighter restrictions in August. 

Public submissions on this proposal close on this week, with a final regulatory decision expected by February 2025. 

The proposed changes aim to mitigate risks through stricter handling protocols, but some experts argue that a complete ban is necessary.

Parkinson’s, a progressive neurological disorder, affects movement, cognition, and overall quality of life. 

Studies suggest that people exposed to paraquat, particularly agricultural workers, have a significantly increased risk of developing the disease. Research also indicates potential risks to those living near areas where the herbicide is applied.

However, grain growers contend that paraquat is vital for sustainable farming in Australia. 

The herbicide is used to manage weeds and conserve soil moisture, critical for food production in an increasingly volatile climate. 

Grain Producers Australia has warned that banning paraquat could force a return to more invasive farming practices, like ploughing, which could lead to topsoil erosion and dust storms. 

The APVMA has stated that its assessment found “no robust association” between paraquat exposure and Parkinson’s when the product is used according to the label. 

However, critics have raised concerns about the integrity of this finding, noting that it was partly based on an unpublished study funded by paraquat manufacturer Syngenta  .

Details of the review are accessible here.

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