Junghuhnia vincta (berkeley) comb. Nov. Root pathogen of pinus radiata

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 Salix matsudana Koidzumi tree was used to inoculate one-year-old seedlings of ten introduced host species from seven genera. After 18 months, 51 outof 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 J. vincta to this host species in the field. © 1988 Taylor & Francis Group, LLC.