100 MISCELLANEOUS PUBLICATION NO, 725, U.S. DEPARTMENT OF AGRICULTURE 
Pierce, Roy G, 1515 
1914, The present status of the chestnut bark disease in 
Massachusetts. Arboreal1 (1): 8-9. 
Pierce, Roy G. 1516 
1914, Tree surgery. Pa. Chestnut Tree Blight Comn., 
Rpt 1913s 50-525) alius: 
Pierce, Roy G, LS? 
1915, Chestnut blight in Nebraska, Phytopathology 5: 74, 
Pierce, Roy G. 1518 
1916, Pinus resinosa, a new host for Peridermium acicolum, 
Phytopathology 6; 302-303, 
Pierce, Roy G. 1519 
1917, Albany conference on white pine blister rust, Phyto- 
pathology 7: 54-55, 
Pierce, Roy G. 1 520 
1917; Early discovery of white pine blister rust in the 
United States, Phytopathology 7: 224-225, 
Pierce, Roy G. 1521 
1918, Additional list of State and National quarantines 
against the white pine blister rust, Phytopathology 
8: 484-486, 
Pierce, Roy G, : P522 
1918, Notes on Peridermiums from Ohio, Need of patho- 
logical viewpoint in nursery inspection, Phyto- 
pathology 8: 292-294, 
Pierce, -RoyiG. E523 
1918, Pine blister rust survey for North Dakota, South 
Dakota, Nebraska, Kansas, Iowa, Illinois, 
Indiana, Kentucky, Tennessee, and Missouri, In 
White Pine Blister Rust, published by Committee 
on the Suppression of the White Pine Blister Rust 
in North America, pp. 23-29, 
Pierce, Roy G: 1524 
1919, Blister rust caused by Cronartium ribicola Fischer, 
U. S. Bur. Plant Indus; , Plant Dis; (Bale sup. 5: 
175-177, [Processed., ] 
Pieree, oy Gr. 525 
1919, The need of State and National quarantines to prevent 
rapid spread of chestnut blight to Southern States, 
Jour, Forestry 17: 449-451, 
Pierce, Roy G. and Hartley, Carl. 1526 
1916, Horse-chestnut anthracnose, Phytopathology 6: 93. 
Pierce, Roy Gj; and Hartley, Gark: 1527 
1919, Relative importance of Pythium and Rhizoctonia in 
coniferous seed beds. (Abstract) Phytopathology 
BS Oz 
Pierce, Roy G.,, and:Pickler, Wee. 1528 
1920, Alphabetical list by States giving numbers for cross- 
reference to State and National regulations con- 
cerning the shipment of five-leaved pines and ribes 
(currants and gooseberries), Natl, Nurseryman 28 
(10): 240, 
Pierson, R. K, 1529 
1933. <A new point of attack for biological control, U. S, 
Bur, Plant Indus., Western Blister Rust News 
Letter 8: 20-21, [Processed, ] 
