REPORT OF THE COMMITTEE ON WHITE PINE BLISTER RUST 649 



Subcommittee on International Resistance Testing Facilities 



(All members represent countries where the white pine blister rust 

 hazard is present and high, and where there is some desire to restore 

 or supplement white pine forests.) 



Subcommittee Chairman 



J. GREMMEN, Section of Pathology and Resistance Research, Stichting 

 Bosbouwproefstation "De Dorschkamp", Bosrandweg 20, Postbus 23, 

 Wageningen, NETHERLANDS. 



Subcommittee Members 



B. K. BAKSHI, Forest Pathology Branch, Forest Research Institute 

 and Colleges, P.O. New Forest, Dehra Dun, INDIA. 



R. J. HOFF, U.S. Dep. of Agriculture, Forest Service, Intermountain 

 Forest $ Range Exp. Sta. , Forestry Sciences Laboratory, P.O. Box 

 469, Moscow, Idaho 83843, U.S.A. 



R. F. PATTON, Dep. of Plant Pathology ; University of Wisconsin, 

 Madison, Wisconsin 53706, U.S.A. 



P. SCHUTT, Forstbotaniches Institut, Universitat MUnchen, 

 8000 MUnchen 13, Amalienstrasse 52, GERMANY. 



B. F. S0EGAARD, Royal Veterinary and Agriculture College, Arboretet, 

 Htfrsholm, DENMARK. 



L. ZUFA, Research Branch, Ontario Dep. of Lands and Forests, Maple, 

 Ontario, CANADA. 



ORGANIZATIONAL MEETING PREPARATIONS 



After staffing of the Committee and Subcommittees, Chairman Bingham 

 suggested that three general problems were in need of consideration by 

 the whole Committee, because these might slow progress at the organiza- 

 tional meeting and hinder future Committee operations. These problems 

 were (1) the lack of uniformity in usage of white pine taxonomy, leading 

 to confusion as to the identity and general or specific source-locality 

 of white pine materials, (2) the scarcity of critical information on 

 relative blister rust resistance of white pine species, and (3) the 

 confusion and insufficiency of information on the origin (or possible 

 gene-centers) of Cronavtiwn vibieola. A 4-page memorandum outlining 

 these problems and the action needed upon them was circulated to all 

 Committee Members July 14, 1969. 



Subcommittee Chairman Kriebel also circulated a memorandum to 

 members of the Subcommittee on Procurement and Exchange of (white pine) 

 Breeding Materials on June 2, 1969, requesting consideration and advice 

 on 12 items of potential Subcommittee business including (1) white pine 

 species to be considered, (2) types of material for exchange, (3) types 

 of trees to be used for collection, (4) methods of stand location, (5) 

 selection of sampling locality, (6) collection timing, (7) collection 

 supervision, (8) number of trees per provenance and seeds per tree, (9) 

 financing of collections, (10) coordination of collection work, (11) plant 



