26 U.S. DEPT. OF AGRICULTURE MISC. PUB. 939 



corded in a separate tabulation. Forest pathologists throughout the 

 world are encouraged to correspond with these scientists. 



Summary 



This presentation reports on Canada's participation in the Working 

 Group on International Cooperation in Forest Disease Research, as 

 follows : 



1. Results from the Forest Disease Survey, which are of interna- 

 tional interest, are published each year. Six regional contributions on 

 the diseases of Pinus, Populus, and Querents have been completed and 

 distributed. A detailed annotated list of diseases of Pinus is in ad- 

 vanced preparation and similar presentations are to be compiled for 

 the other major tree species. A series describing the diseases of each 

 important timber tree is also in view. Special surveys are being under- 

 taken on the diseases of Douglas-fir and on dwarfmistletoes of conifers. 



2. Quarantine measures are being reviewed. 



3. Test plantations of exotic hardwoods and conifers established 

 throughout Canada by provincial governments and industries are being 

 examined periodically to determine susceptibility to native diseases. 

 Inoculation tests are also being made utilizing some of the most im- 

 portant native pathogens. These tests could be made more meaningful 

 to all countries if inoculation procedures and host material were 

 standardized. 



4. Literature reviews are generally included as part of each com- 

 prehensive publication. Also, a number of reports have been made 

 summarizing the diseases of individual trees or the types of pathogens ; 

 more of these reviews are contemplated. Current publications of 

 international interest are listed in the Annual Report of the Forest 

 Insect and Disease Survey and the Bi-Monthly Progress Report. An 

 annual tabulation of publications by the Forest Entomology and 

 Pathology Branch lists a number of research contributions of interest 

 to pathologists in other countries. 



5. A directory of forest pathologists and their research activities 

 has been prepared and distributed to IUFRO member countries. 



Literature Cited 



(1) Bier, J. E. The relation of bark moisture to the development of' canker 

 diseases caused by native, facultative parasites. V. Rooting behavior and 

 disease vulnerability in cuttings of Populus trichooarpa Torrey and Gray, 

 and P. 'robusta'. Canad. Jour. Bot. 39 : 145-154. 1961. 



(2) Canada, Department of Agriculture. The destructive insect and pest act 

 and regulations thereunder. Ottawa. 1949. 



(3) Canada, Department of Forestry. Annual report of the forest insect and 

 disease survey 1960. Forest Ent. and Path. Branch, Ottawa. 1961. 



(4) Foster, R. E., and Johnson, A. L. S. Forest disease sampling studies in 

 Douglas fir plantations. III. Canad. Dept. Agr., Forest Biol. Div., Vic- 

 toria, B.C. 1960. 



(5) Kuijt, J. Dwarf mistletoes. Bot. Rev. 21 : 569-628. 1955. 



(6) Molnar, A. C. Province of British Columbia, Forest Disease Survey. In 

 Ann. Rpt. of the Forest Insect and Dis. Surv. 1960. Canad. Dept. Forestry, 

 Forest Ent. and Path. Branch, Ottawa. 1961. 



(7) and Garman, E. H. Introduction of exotic trees to British Co- 

 lumbia. B. C. Lumberman 42: 36-37. 1958. 



