REVIEWS 325 



returns so far amounted to only $1,100,000; but the permanent im- 

 provements are estimated at near $600,000. 



Over a quarter million trees were distributed free of charge, such 

 distribution having during 36 years disposed of nearlv 10 million trees. 



B. E. F. 



Report on White Pine Blister Rust Control, ipi8. Bulletin 2, Amer- 

 ican Plant Pest Committee. Boston, Mass. 1919. Pp. 16. 



In 191 5, as a result of a conference of foresters and pathologists, a 

 committee on the suppression of the pine blister rust in North America 

 was formed. This committee was reorganized in 1918 as the American 

 Plant Pest Committee at the fourth annual meeting at Boston in No- 

 vember, 191 8. It is a large international committee, composed of four 

 members from each State and Canadian Province, as far as possible 

 consisting of officials having to do with plant pests, namely, commis- 

 sioners of agriculture. State foresters. State entomologists, and State 

 horticulturists. Its purpose is mainly educational and to secure meas- 

 ures for plant pest control. 



The present publication covers very fully the situation of the efforts 

 to control the blister rust of the white pine, and. we may say at the 

 start, takes an entirely optimistic attitude as regards the possibility of 

 its eradication. It takes, also, the position that the responsibility of 

 control must finally rest with the forest owner. This, in our opinion, 

 although the response is reported very satisfactory, is a dangerous con- 

 clusion, since one owner's neglect in such cases frustrates the eft'orts 

 of all others. The committee recognizes this result, however, and, not 

 to lose the momentum gained by State enterprise, urges continuous 

 appropriations for the purpose. 



We are specially assured that "commercial planting of zvliite pine is 

 practicable, if care is taken to secure uninfected planting stock, and if 

 all currants and gooseberries are destroyed in and around the planting 

 area to a distance of not less than 200 yards, and preferably to at least 

 500 or 600 yards." The removal of all Ribes (cultivated or wild) is 

 declared to be the only practical remedy, and it is found that this can 

 be done cheaply enough in most cases. On the demonstration control 

 areas the costs ran from 17 cents to $19.16 (in swamps), but the aver- 

 age in all types remained mostly below one dollar, running from 25 

 cents to $2.47 per acre. This with the high w^ar labor cost. 



Detail accounts are given for the Northeastern States and Canadian 

 Provinces. Pennsylvania, New Jersey, and farther Southern and Cen- 



