466 



Journal of Agricultural Research 



Vol. X, No. 9 



Table 'KXN 111. —Results of inoculations with uredinios pores of Puccinia graminis 



tritici — Continued 



<» A very large number of inoculations were made with many wheat rust strains. 

 I)er cent of the leaves became heavily infected. 



Nearly always too 



The following summary can be made from the results obtained. The 

 results of inoculations with rust from the various species of Triticum 

 listed below are not given in the tables, since the results were so obvi- 

 ously what would be expected, and in one or two cases the inoculations 

 were not actually made. 



Hosts found infected in nature: Agropyron caninum (L.) Beauv., A. 

 cristatum J. Gaert., A. smithii Rydb., A. spicatum (Pursh,) Rydb., A. 

 tenerum Vasey, Elymus brachystachys Scribn. and Ball, E. canadensis L., 

 E. macounii Vasey, E. rohustus Scribn. and J. G. Sm., E. virginicus L., 

 Hordeum caespitosum Scribn., H. jubatum L., H. pusillum Nutt., H. 

 vulgare ly., Hystrix patula Moench., Secale cereale L., Triticutn compactum 

 Host., T. dicoccum Schr., T. durum Desf., T. monococcum L., T. poloni- 

 cum L., T. spelta L,., T. iiirgidum L., T. vulgare Vill. 



Hosts easily infected artificially: Agropyron elongatum Host., Bromus 

 hordeacetis L., B. puinila, B. tectorum ly., Hordeum sponianeum K. Koch., 

 H. vulgare (Abyssinian), H. vulgare pallidum Ser., H. vulgare pallidum 

 subvar. pyramidatum. 



Weakly infected as a result of artificial inoculation : Agropyron interme- 

 dium Beauv., A. repens (L.) Beauv., Alopecurus pratensis ly., Avena 

 sativa L., Secale cereale L. 



Inoculated but not infected: Agropyron desertorum Schult., A. imbri- 

 caium, Roem. and Schult., A. sibericum Beauv., Agrosiis alba L., A. sto- 



