[ASC-media] FUNGICIDE LABEL CHANGES TO BETTER MANAGE RESISTANCE: GRDC Media Release

BRENDON CANT brendon at iinet.net.au
Wed Mar 18 01:33:35 CET 2009


GRDC Media Release – 18/3/09



Fungicide label changes TO BETTER MANAGE resistance





Grain growers who spray their crops regularly with fungicides should
carefully note that label changes will affect how they manage fungicide
resistance, according to Grains Research and Development Corporation (GRDC)
Western Region Panel Deputy Chair, Professor Richard Oliver of Murdoch
University.



“The fungicide activity group codes have changed from letters to numbers to
bring the Australian fungicide classification system into line with the rest
of the world,” he said.



“These label updates will be phased in over the next three years.”



All fungicides sold in Australia are classified according to their chemical
activity group to identify fungicides that work by similar means and which
share a common resistance risk. Each activity group may contain a number of
different fungicides.



“Pathogen resistance to fungicides could become a serious problem in
Australia. But we can minimise the risk if growers avoid repeated and often
uninterrupted use of fungicides with the same chemical mode of action,”
Professor Oliver said.



“Adopting and following an appropriate resistance management strategy is the
key to avoiding future resistance problems.”



When the same fungicide (or fungicides from the same activity group) is
sprayed on crops repeatedly, naturally resistant individuals in the fungus
population can become dominant and the fungicide no longer controls the
disease.



Resistance management strategies rotate fungicide products with a different
chemical activity group to prevent over-using any one product or activity
group.



Australia has managed fungicide resistance using a fungicide activity group
classification system developed by CropLife Australia, whose member
companies develop, manufacture and market 85 per cent of Australia’s crop
protection products.



According to CropLife Australia Assistant Director - Regulatory and
Technical,

Dr Adrian Harris, CropLife regularly updates the Fungicide Activity Groups
table and Fungicide Resistance Management Strategies on its website.



Australia was the first country to introduce compulsory activity group
labelling on fungicide product containers.



“CropLife decided that, while the Australian classification system is still
relevant and useful, it would be advantageous to align it with the
international fungicide activity group classification system,” Dr Harris
said.



“By having this alignment, we stand to benefit from global advances in
management of fungicide resistance.”



CropLife completely revised the Australian system in 2008 and the activity
group codes were changed from letters to numbers (or letter/number
combinations). The Australian Pesticides and Veterinary Medicines Authority
and state regulatory authorities support the changes.



The Fungicide Resistance Management Strategies were also revised to reflect
the new activity group codes.



Most fungicides remain in the same chemical activity group, with only the
codes for the groups changing.



“Growers should note that until all product labels have been updated by
October 2011 to reflect the new codes, some labels may display the old code
letter,” Dr Harris said.



CropLife Australia has published a table, showing old and new codes for all
active ingredients in fungicides registered in Australia, at
www.croplifeaustralia.org.au to help growers with fungicides labelled with
the old code letters.



“The new activity group code number will be needed when referring to the
Fungicide Resistance Management Strategies,” Dr Harris said. “The strategies
are a guide only and growers must still follow specific use instructions on
fungicide product labels.”



www.grdc.com.au

Authorised by GRDC and issued on its behalf by Brendon Cant & Associates,
Tel 08 9384 1122
MEDIA CONTACT: Professor Richard Oliver, Tel 08 9360 7404



Fungicide Labels.doc/GRDC CODE UM00031/Rainbow250209



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