trolled now fron Washington. Eastern Tftiito Pino (Pinus 

 strobus) is grown to a vory considerable orfcont in European 

 norsorios, whoro it has "boon subject to a disease caused 

 ID 7 a rust fungus, Poridosmiuin strobi. Tho fungus kills 

 nursery stock and doos onornous damage. Peculiarly enough, 

 tho di&Gsno was unknown in tho Unitod States, that is, in 

 the homo of tho Y/hite Pino, up to comparatively fow years 

 ago, when it ooulcl "bo traced to imported European stock. 

 Tho Office of Forest Pathology not only iimnodiatoly organ- 

 ised a campaign against tho diso^co in tho Unitod States, 

 "but has also succeodoc. in getting Oongross to adopt strict 

 qiuarantino measures against the importation of European 

 stock. Although tho disease has not "boon found so far on 

 our SUGSX Pino in California, it has "boon successfully in- 

 coulatod on Sugar Pino stock at Washington, Should tho 

 disoaso spread in tho East, wo would finally got it out 

 hero, and that would pro"bahly moan tho end of our Sugar 

 Pino reproduction. The control work done in tho Eact a is, 

 therefore a of vital importance to us right hero on tlio Pa- 

 cific Coast. 



You nay ho more interested in knowing something 

 about the practical aspect of Forest Pathology in District 

 5 9 The nne groat obstacle in the way of applying the 

 science of Pathology to practical Porestry was the lack of 

 accurate data and of reliable methods of interpreting saoh 



