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PESTS AND DISEASES OF FORESTRY IN NEW ZEALAND


 Barron Road Syndrome, a disease of Eucalyptus regnans in New Zealand


Barron Road Syndrome, a disease of ash eucalypts

See Eucalyptus foliage diseases
Forest Research Bulletin 220


DEFOLIATION OF EUCALYPTUS REGNANS: BARRON ROAD SYNDROME (BRS)
Forest Health News 101, October 2000


From Forest Health News No. 21, June 1993
Barron Road Syndrome
Pathogenicity trials on potted Eucalyptus regnans using four fungi implicated as having a contributory role to the Barron Road Syndrome, have been evaluated. Colletotrichum sp. was reisolated from inoculated trees showing tip death and shoot loss. Trees inoculated with mycelial suspensions of the other fungi (Aulographina eucalypti, Cladosporium
sp. and Elsinoe sp.) remained symptomless after 2 months.
(Monique Williams)

From Forest Health News No. 15, November 1992
Barron Road Syndrome (BRS) - 
Eucalyptus regnans
On the 19 November, a meeting was held at FRI to discuss the status of BRS research. FRI staff (from Forest Health and Soils), Peter Carter, Rob van Rossen and Gordon Beets of CHH; and John Bathgate of Waikato University came to the conclusion that BRS was not controllable by acceptable operational practices. CHH have stopped planting all eucalypts and E. regnans seems to be preferred only by Caxton, who should be able to select suitable sites for their small resource. It was decided to continue for this season only, attempts to identify the causal agents of BRS and to assess E. regnans family plantings for resistance. (Nod Kay)           

UPDATE - on what's happening in Forest Health June/July 1991
The foliage of
Eucalyptus regnans trees sprayed regularly with fungicide has been kept free of the galls and spots typical of the Barron Road Syndrome. Since spraying ceased (late May) symptoms have begun to appear and material from these trees has been collected fortnightly for detailed microscopic examination and for isolation work.

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