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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