98 Journal of Agricultural Research voi. xiii. no. i 



(3) Plantings of disease-free seed potatoes on new lands in southern 

 Idaho failed to yield a disease-free product. 



(4) The presence of parasitic fungi in these soils suggests that infec- 

 tion in potatoes may often originate with soil organisms. 



(5) The results obtained from planting disease-free seed potatoes on 

 cultivated lands never in potatoes, and on virgin desert land further 

 substantiate the opinion that land, previously cropped with such crops 

 as alfalfa, clover, and grain, is better adapted to the production of disease- 

 free potatoes than virgin desert land. 



LITERATURE CITED 

 (i) Appel, O., and WollEnweber, H. W. 



I910. GRUNDLAGEN EINER MONOGRAPHIE DER GATTU^fG PUSARIUM (LINK.) 



In Arb. K. Biol. Anst. Land, und Forstw., Bd. 8, Heft i, p. 1-207, 

 9 fig., 3 pi. (i col.) Verzeichnis, p. 196-198. 



(2) Carpenter, C. W. 



i915. some potato tuber-rots caused by species op pusarium. in jour. 

 Agr. Research, v. 5, no. 5, p. 183-210, pi. A-B (col.), 14-19- Literature 

 cited, p. 208-209. 



(3) Ellis, J. B., and Everhart, B. M. 



1895. NEW species of FUNGI FROM VARIOUS LOCALITIES. In Proc. Acad. 



Nat. Sci. Phila., 1895, p. 413-441. 



(4) Fautrey, F., and Lambotte, E. 



1896. ESP^CES NOUVELLES DE LA c6te-d'or. In Rev. Mycol., Ann. 78, no. 70, 



p. 68-82. 



(5) Jamieson, Clara O., and WollEnweber, H. W. 



I912. AN EXTERNAL DRY ROT OP POTATO TUBERS CAUSED BY PUSARIUM 



TRiCHOTHEcioiDES, woLLENW. In Jour. Wash. Acad. Sci., v. 2, 

 no. 6, p. 146-152, I fig. 



(6) Link, C. K. K. 



i916. a physiological study of two strains op pusarium in their causal 



RELATIONS TO TUBER ROT AND WILT OP POTATO. In Bot. Gaz., V. 62, 



no. 30, p. 169-209, 13 fig. Literature cited, p. 207-209. 



(7) Peltier, G. L. 



I916. PARASITIC RHIZOCTONIAS IN AMERICA. 111. Agr. Exp. Sta. Bul. 189, 



p. 283-390, 23 fig. Bibliography, p. 386-390. 



(8) Penzig, O. 



1882. CONTRIBUZIONE ALLO STUDIO DEI FUNGHI PARASSITI DEGLI AGRUMI. 



In Michelia, v. 2, no. 7, p. 385-492. 



(9) Pratt, O. A. 



I916. CONTROL OP THE POWDERY DRY ROT OP WESTERN POTATOES CAUSED BY 



PUSARIUM TRICHOTHECIOIDES. In JouT. Agr. Research, v. 6, no. 21, 

 p. 817-832, pi. 108. 



(10) 



1916. EXPERIMENTS WITH CLEAN SEED POTATOES ON NEW LAND IN SOUTHERN 



IDAHO. In Jour. Agr. Research, v. 6, no. 15, p. 573-575. 



(11) 



I916. A WESTERN FIELD ROT OF THE IRISH POTATO TUBER CAUSED BY PUSARIUM 



RADICICOLA. In Jour. Agr. Research, v. 6, no. 9, p. 297-310, pi. 34-37. 



(12) Rabenhorst, L. 



I910. KRYPTOGAMENPLORA VON DEUTSCHLAND, OSTERREKH UND DER SCHWEIZ. 



Aufl. 2, Bd. 9. Leipzig. 



