New Zealand Journal of Crop and Horticultural Science
abstracts
Wood rotting fungi and pine mulches enhance parasitism of Ciborinia camelliae sclerotia in
vitro
R. F. van Toor
New Zealand Institute for Crop and Food
Research Limited
Canterbury Agriculture and Science Centre
Private Bag 4704
Christchurch, New Zealand
email: vantoorr@crop.cri.nz
M. V. Jaspers
A. Stewart
Soil, Plant and Ecological Sciences Division
P.O. Box 84
Lincoln University
Canterbury, New Zealand
Abstract Nineteen fungal isolates were evaluated in vitro in
a study to determine their ability to colonise pine sawdust and subsequently
degrade sclerotia of the camellia flower blight fungus Ciborinia camelliae.
The fungal isolates included saprophytic wood rot fungi and a mixture of Trichoderma spp.
isolated from decaying sclerotia of C. camelliae. The white rot isolates, Schizophyllum commune Sc3, Phanerochaete cordylines HR469,
and Pycnoporus coccineus HR582 were effective in degrading 60–80%
of sclerotia after incubation for 11–16 weeks. In addition, both P.
cordylines HR496 and P. coccineus HR582 degraded melanin in agar,
suggesting that they may have potential to degrade melanin in the protective
rinds of sclerotia. Sclerotial mortality was 77% when sawdust was amended with
a mixture containing isolates of Trichoderma spp. When the mix of Trichoderma isolates
was added to assays containing white rot isolates, they increased sclerotial
mortality over that caused by each isolate alone. Incorporating saprophytic
white rot fungal species or Trichoderma spp. into pre-prepared tree
mulches under camellia bushes warrants investigation for long-term control
of camellia flower blight.
Keywords camellia flower blight; Ciborinia camelliae;
melanin; pine mulch; Phanerochaete cordylines; Pycnoporus coccineus;
sclerotia; Schizophyllum commune; Trichoderma spp.
New Zealand Journal of Crop and Horticultural Science, 2005, Vol. 33:
389–397
0014–0671/05/3304–0389 © The Royal
Society of New Zealand 2005
H05032; Online publication date 9 November 2005
Received 22 March 2005; accepted 15 July 2005
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