
Paraquat is used to spot spray weeds through systems like John Deere’s See and Spray, while diquat is used as a desiccant in pulse crops particularly to maximise yield and quality. Photo: John Deere
CONSULTATION on the Australian Pesticides and Veterinary Medicines Authority’s proposed regulatory decisions on paraquat and diquat closed yesterday, with submissions received from across industry, community, medical and public health sectors.
Both chemicals are used widely in broadacre cropping, and uses include paraquat as an alternative to glyphosate to kill weeds in fallow, and for spot-spraying, while diquat is used as a desiccant in pulse crops.
“We recognise that there is heightened interest in paraquat, both from those who rely on it as a key tool in farm management, as well as those who have concerns of a possible link between paraquat and Parkinsons Disease,” APVMA chief executive officer Scott Hansen said in a statement.
According to the APVMA website, final regulatory decisions on diquat and paraquat are expected in the week commencing 19 May 2025, but Mr Hansen’s statement has opened the door for a fast-tracked timeline on paraquat.
“We take human health risks seriously and should new evidence emerge out of this consultation process that shows an imminent risk to human health, then we have the power to take quick action.”
Submissions to the APVMA on both chemicals opened July 30, and more than 100 have been received in relation to paraquat alone.
The APVMA will make all submissions and its responses public once the final regulatory decision has been released.
“The APVMA’s team of scientists will now assess all the comments, information and supplementary data we received, which may result in refinement or a change in our risk management recommendations.”
The APVMA’s chemical review process incorporates legislative, administrative and scientific elements that contribute to the final decision to affirm, vary, suspend or cancel an approval or registration.
When a chemical currently approved for use in Australia undergoes a review, it is assessed using contemporary scientific standards against the statutory criteria of safety, efficacy, and trade.
Source: APVMA
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