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Frost hits new Myco trial

Frost Damage

Frost damage on the growing tips of a blue gum seedling in the
Gould’s Country Mycosphaerella trial (Image: Brad Potts).

Paul Tilyard
School of Plant Science
University of Tasmania

In April this year frost caused damage to seedlings in the new blue gum (Eucalyptus globulus) trial at Gould’s Country in north-eastern Tasmania.  The trial was established late in 2008 to study susceptibility to Mycosphaerella leaf disease (see separate article in Biobuzz 8).  The frost damage, which affected the growing tips (see image), was assessed throughout the trial in May.  Eucalyptus nitens seedlings from operational seedlots included in the trial were unaffected, but 88% of E. globulus seedlings showed evidence of frost damage to their buds.  Full analysis of the data is still to be completed.  Although the damage was widespread it is not thought to have had a significant long-term impact on the seedlings, which, we hope, will be hit by Mycosphaerella this spring!

Biobuzz issue nine, august 2009