Index to American Mycological Literature 127 



Earle, F. S. Sugar cane root disease. Jour. Dept. Agr. Porto 

 Rico 4: 27. Ja 1920. 



Greaves, J. E. & Carter, E. G. Influence of moisture on the bac- 

 terial activities of the soil. Soil Sci. 10: 361-387. /. 1-4. N 

 1920. 



Harvey, R. B. Some enemies of the potato. Sci. Am. Mo. 2 : 

 120-122. /. 1-9. O 1920. 



Hayes, H. K., Parker, J. H. & Kurtzweil, C. Genetics of rust re- 

 sistance in crosses of varieties of Triticum vulgare with varie- 

 ties of T. durum and T. dicoccum. Jour. Agr. Research 19 : 

 523-542. pi. 97-102. 1 S 1920. 



Hohnel, F. Mykologische fragmenti. Ann. Myc. 18: 71-97. 

 1920. 



Includes Valseutypella gen. nov., from North America. 



Holbert, J. R. & Hoffer, G. N. Control of the root, stalk and ear 



rot diseases of corn. U. S. Dept. Agr. Farmers' Bull. 1176: 



3-24. /. 1-25. S 1920. 

 Hubert, E. E. Observations on Cytospora chrysosperma in the 



northwest. Phytopath. 10 : 442-447. 1920. 

 Kirby, R. S. & Thomas, H. E. The take-all disease of wheat in 



New York state. Science II. 52 : 368-369. 15 O 1920. 

 Kunkel, L. 0. Further data on the orange-rusts of Rubus. Jour. 



Agr. Research 19: 501-512. pi. D & pi. 92-04. 16 Au 1920. 

 Kunkel, L. 0. & Orton, C. R. The behavior of American potato 



varieties in the presence of the wart. U. S. Dept. Agr. Circ. 



in : 10-17. /. 2, 3. O 1920. 

 Kunkel, L. 0. & Orton, C. R. A new host for the potato wart 



disease. U. S. Dept. Agr. Circ. in : 17, 18. /. 4. O 1920. 

 LaRue, C. D. Isolating single spores. Bot. Gaz. 70: 319-320. 



19 O 1920. 



Lyman, G. R. Potato wart in the United States. U. S. Dept. 



Agr. Circ. 111 : 3-10. /. 1. O 1920. 

 Matz, J. A new vascular organism in sugar cane. Jour. Dept. 



Agr. Porto Rico 4: 41-46. /. 7-9. Ja 1920. 



Plasmodiophoia vascularum sp. nov. 



