The Stringybark Trees are dying

The Stringybark trees on YackaYacka at Littlehampton are some of the more easterly that I've seen around this area. They tend to grow in the higher rainfall areas of the Mount Lofty Ranges.
Over the last 2 to 3 years there have been increasing numbers of them dying on my property and why that is I am not sure. I thought initially it was because of the preceeding exceptionally dry years but the trees continue to die even in a wet year such as the second half of 2010 into 2011.
 
8/3/11 - Advice from the Native Vegetation Council
'''''  Being more susceptible than other gums Stringybark has been affected with phytophthora (a root disease) over the past couple of years, particularly in the Adelaide Hills area.  This health issue has not at all been helped by the years of past drought.  '''''''