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- Aug 8, 2005
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A tale of the weird, and almost loss of a rare tree species.
Way back when it was noticed that the Englemann Oak, Quercus Englemannii, of So. Cal was suffering from severe die back and die off.
What was strange about this die off was it appeared to happen to well cared for trees the most. All the LA County arboretums had the problem.
After a few months of scratching their heads they came to find a common denominator. The oaks that were being watered suffered the worst.
This in turn came to the discovery the Honey Fungus, Amillaria Mellea, was the culprit, attacking the roots of the oak. The oaks in their natural arid environment went mostly unaffected.
So they started checking and testing the fungus, how it spread, were other varieties involved and so on. Some of the first genetic type matching was done on this fungus.
And a mind numbing result came out of these lab tests. The samples of fungi taken from the roots of oaks out by Riverside were the same as the samples at Santa Anita Botanical Gardens. Not just a type match, it was the same exact fungi. In one particular test they identified a colony that was over 35 miles across.
Way back when it was noticed that the Englemann Oak, Quercus Englemannii, of So. Cal was suffering from severe die back and die off.
What was strange about this die off was it appeared to happen to well cared for trees the most. All the LA County arboretums had the problem.
After a few months of scratching their heads they came to find a common denominator. The oaks that were being watered suffered the worst.
This in turn came to the discovery the Honey Fungus, Amillaria Mellea, was the culprit, attacking the roots of the oak. The oaks in their natural arid environment went mostly unaffected.
So they started checking and testing the fungus, how it spread, were other varieties involved and so on. Some of the first genetic type matching was done on this fungus.
And a mind numbing result came out of these lab tests. The samples of fungi taken from the roots of oaks out by Riverside were the same as the samples at Santa Anita Botanical Gardens. Not just a type match, it was the same exact fungi. In one particular test they identified a colony that was over 35 miles across.