New Zealand Journal of Botany abstracts

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Junghuhnia vincta (Berkeley) comb, nov., root pathogen of Pinus radiata

I. A. HOOD
M. DICK

Forest Research Institute
Private Bag
Rotorua, New Zealand

Abstract Junghuhnia vincta (Berkeley) comb, nov. is proposed for Poria vincta (Berkeley) Cooke, causal agent of a root disease of Pinus radiata D. Don. The disease occurs in young plantations in the Bay of Plenty, predominantly on sites previously stocked in native forest. The fungus also attacks dicotyledonous and coniferous trees in orchard shelterbelts in the same region. An isolate from a diseased Salixmatsudana Koidzumi tree was used to inoculate one-year-old seedlings of ten introduced host species from seven genera. After 18 months, 51 out of 110 inoculated plants had become infected, 30 of which had died. There were significant differences in levels of infection between species. Of 13 inoculated seedlings of P. radiata, three became diseased, confirming the pathogenic behaviour of/, vincta to this host species in the field.

Keywords Chaetoporus radulus; Chaetoporus vinctus; Junghuhnia vincta; Pinus radiata; Poria vincta; Rigidoporus vinctus; root disease

Received 8 December 1986; accepted 18 June 1987
New Zealand Journal of Botany, 1988, Vol. 26: 113-116
0028-825X/88/2601-113$2.50/0 © Crown Copyright 1988

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