Australia
October 16, 2008
Reports of rust in wheat and
barley varieties identified as resistant or moderately resistant
and what appears to be different levels of susceptibility to
stripe rust in one variety have raised questions about variety
identification.
A newly released GRDC Fact
Sheet, "Rust Management", suggests that growers should only buy
certified seed and if saving their own seed should check storage
records between seasons and have variety identification tests
done.
According to Dr Rohan Rainbow, GRDC Manager, Crop Protection,
the apparent discrepancies may be due to varieties with adult
plant resistance coming under attack early, before the
resistance mechanism in the plant has had time to take effect.
"It could also result from environmental factors, such as
proximity to sources of rust infection, or a simple case of
mis-identification of which variety is being sown," he said.
For the latest on stripe rust and resistance, visit
www.grdc.com.au/rustlinks or, for local information, contact
Bill Macleod at
DAFWA, Tel 08 9363 3333 |
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