fungicide resistance considered the next major threat in Australian
grain production, global crop protection company Adama has gone on the
front foot, encouraging the industry to develop an integrated approach
to disease management.
week the company staged workshops in Esperance and at Curtin
University, Perth, which were keenly attended by a strong contingent
of the State’s agricultural advisers and agronomists.
speakers included Geelong-based Nick Poole who is the managing
director of the Foundation for Arable Research (FAR), and Dr Fran
Lopez-Ruiz, fungicide resistance group leader at the Centre for Crop
and Disease Management (CCDM) at Curtin University in WA.
CCDM is a joint venture between the university and the Grains Research
and Development Corporation and only recently opened new
WA market development manager Bevan Addison said the industry only
needed to look at Europe where a heavy reliance on fungicides had
created resistance issues due to lack of good management in the early stages.
Addison said in WA, an intensive cereal rotation, due to limited
rotational options, contributed to the increased likelihood of disease
pressure and use of fungicides.
Lopez-Ruiz updated the workshops on the different diseases showing
resistance in a range of crops across Australia, including immediate
concerns for powdery mildew and septoria blotch in cereals and
recently with spot form net blotch in barley near Esperance.
said the industry had traditionally been slow to respond to reduced
fungicide efficacy and he encouraged adoption of integrated disease
management strategies whenever possible, including selecting resistant
crop varieties; rotating fungicide modes of action; selecting
fungicide mixtures with different modes of action; as well as testing
stubble or fresh leaf samples.
Addison said there was a requirement for more widespread testing and
the CCDM facility was now available to the industry.
Poole discussed the development of disease and resistance over the
life of a crop, spraying applications and the particular timing of
treatments for best disease control, and he provided an update on
fungicide modes of action, their activity and different disease targets.
said relevant disease levels, crop growth stage, crop conditions and
fungicide timing windows all needed to be considered to assist correct
the most money out of fungicide and getting the best disease control
can be two different things,’’ Mr Poole said.
undertakes independent work for Adama as part of its ongoing
lot of guys want to put fungicides in with herbicides, but sometimes
you may get better impact from an in-furrow treatment,” Mr Poole said.
some diseases, the emergence of the ‘money leaves’ on the main stem
and getting fungicide applications in that window will give best results.’’
resistance, there can be confusion between herbicide and fungicide
resistance and while it is often considered that increasing
application rates is a good measure against herbicide resistance, Mr
Poole said research data did not support this in the case of fungicide resistance.
the rate, leading to better control, might be desirable, but it’s not
necessarily an anti-resistance measure when it comes to fungicide resistance.’’
Poole said the fact there were fewer active ingredients available to
the industry meant they would come under increasing pressure, and he
encouraged advisers and consultants to “keep on top’’ of active
ingredients and loadings.
active ingredients have different levels of resistance risk, with
some, such as DeMethylation Inhibitors (DMI) fungicides, only slowly
becoming less effective, while others, such as strobilurin fungicides,
develop resistance and become completely resistant quickly.
Addison said Adama would continue to work closely with industry and
invest in the training of key influencers in an effort to help sustain
the limited range of fungicides used in Australia and provide
solutions to growers.
has a suite of products that can provide solutions at most points in
the season, however, as an industry, we need to develop integrated
long-term strategies around fungicide use from seeding right through
the life of the crop,’’ Mr Addison said.
company is looking globally for alternative fungicide options and is
constantly screening active ingredients and mixes that will suit the
local disease spectrum and cropping systems in Australia.’’
Lopez-Ruiz said there also was an opportunity for companies to review
existing chemistries and the recycling of compounds, which was another
strong focus area for Adama.
Addison said Adama was continuing to invest in ongoing development of
older active ingredients, recently illustrated by the release of its
high load propiconazole product, Bumper 625, which now allows for
mixing of propiconazole fungicides more readily and with greater crop safety.
allows growers a one-pass solution, whereas previously with older
formulations, they were very wary of crop scorch,” Mr Addison said.
said it had two and a half times the loading with less solvent,
meaning it had a lower use rate and much lower solvent application,
providing benefits to growers and also to the environment, with less
solvent, drum disposal and transport.’
Addison said when developing a dual mode of action product, the
company was striving to achieve the ideal ratio of high and low risk
fungicides to help prevent unnecessary pressure on the higher risk
fungicides, like strobilurin.
For information please contact:
Scott Harlum, Campaign & Brand Manager
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(This article appeared originally in the August 2017 issue of Rural Business Magazine)