46 



CEREAL RUSTS OF THE UNITED STATES. 



is evidence, too, that many identifications of cereal rusts have been made 

 simply at random. Though the crown rust of oats is recorded as occur- 

 ring on a great many wild grasses, the writer has made but two collec- 

 tions of rust on such grasses which he could demonstrate, even ou 

 morphological grounds, to be this rust. 



The writer has made more inoculation experiments with oat rusts 

 than with any of the other cereal rusts. The following table gives a 

 summary of his experiments with the crown rust: 



Table 6. — Inoculation experiments with Uredo voronata. 



Date of 



inocula- 



tiou. 



1896. 

 Feb. 6 



Do... 

 Feb. 14 



Do... 



Do... 



Do... 



Do... 



Do... 



Do... 

 Feb. 24 



Mar. 4 



Do... 



Do... 



Do... 



Do... 



Do... 



Do... 



Do... 



Do... 



Do... 



Do... 



Do... 



Do... 



Do... 



Do... 



Do... 



Do.. 



Do... 

 Mar. 11 



Do... 



Do... 



Do... 



Do... 



Do.. 



Do... 



Do... 



Do... 



Do... 



Do... 

 Mar. 12 



Do... 



Do... 



Do .. 



Do... 



Do... 



Do... 



Do... 

 Mar. 18 

 Mar. 30 

 Apr. 6 



Do... 



Do... 

 Apr. 9 



Do... 



Do. . 



Do... 



Do... 



Do... 

 Apr. 11 

 Apr. 17 



Do... 



Place where experi- 

 ments were made. 



• Washington, D. C. 

 do 



-do . 

 .do . 

 .do . 

 .do . 

 .do . 

 .do . 

 .do . 

 .do . 



.do . 

 .do . 

 .do . 

 .do . 

 .do . 

 .do . 

 -do . 

 .do . 

 .do . 

 .do . 

 .do . 

 .do . 

 .do . 

 .do . 

 .do. 

 .do . 

 .do . 

 .do. 

 .do . 

 .do. 

 .do . 

 -do . 

 .do. 

 .do. 

 .do. 

 .do. 

 .do . 



do . 

 .do . 

 .do . 



do. 

 .do. 



do. 

 .do . 

 -do. 

 .do . 

 ..do . 

 .do. 



do . 

 .do. 

 ..do . 

 ..do , 

 ..do, 

 ..do. 

 ..do 

 ..do 

 . .do 

 ..do 

 ..do 

 ..do 

 ..do 



Origin of 

 inoculat- 

 ing ma. 

 terial. 



Oats . 



...do 



...do 

 . . . .do 

 ....do 

 ....do 



...do 

 ....do 



...do 

 ....do 



.do . 

 .do . 

 .do . 

 do . 

 .do. 

 -do. 

 .do. 

 .do . 

 .do . 

 .do . 

 .do . 

 .do . 

 .do . 

 .do . 

 .do . 

 .do. 

 .do . 

 .do . 

 .do . 

 .do . 

 .do. 

 .do. 

 .do . 

 .do . 

 .do. 

 .do. 

 .do . 

 .do . 

 .do 

 .do. 

 .do. 

 .do 

 .do . 

 .do 

 .do. 

 .do 

 .do 

 .do . 

 .do 

 .do, 

 .do 

 .do 

 .do 

 .do 

 .do, 

 .do 

 .do 

 .do 

 .do 

 .do 

 .do 



Plant inoculated. 



Period 

 of incu- 

 bation 

 (days). 



Siberian oats 



Black Tartarian oats 



Siberian oats 



Black Tartarian oats 



Early Para wheat 



Siberian wheat 



Siberian barley 



Siberian rye 



Nebraska White Prize corn. 

 Hordeum murinum '. - 



Siberian wheat 



....do 



Siberian rye 



....do.... 



Early Para wheat 



do 



Siberian barley 



do 



Corn 



do 



Rieti wheat 



Siberian millet 



Safeed wheat 



Persian Ked Spring wheat 



Beloturka wheat 



Shirosawa wheat 



Persian Black barley 



Rieti wheat 



Sixrowed barley 



Avenafatua 



Hungarian White oats 



Donka wheat 



Si berian oats 



Pied de Mouche oats 



Chinese barley 



Agi-ostis alba vulgaris 



Dactylis glomerata 



Elymus virginicus 



Nackter Kleiner Fahnen oats . . 



Siberian millet 



Safeed wheat 



Haffkani wheat 



Etampes oats 



Nebraska White Prize corn 



Persian Black barley 



Dactylis glomerata 



Etampes oats 



Late Danish oats 



Hordextni'irmrinum 



Avena pratengis 



Eoeleria cristata 



Phleinn pratense 



Bromus unioloides 



Agropyron repens maritimuiii !. 



Agrostis alba vulgaris 



Lolium perenne 



Dactylis glomerata 



Koeleria cristata 



A vena pratensis 



Fentons Rust Proof oats 



Avena pratensis 



Result. 



10 

 10 

 10 

 10 

 10 

 10 

 10 

 17 



35 



29 



35 



29 



35 



29 



35 



29 



35 



29 



12 



12 



12 



12 



12 



12 



12 



13 



7 



7 



7 



7 



7 



7 



7 



7 



7 



12 

 14 

 12 

 12 

 12 

 12 

 12 

 11 

 11 

 10 

 10 

 10 

 10 

 13 

 13 

 19 

 13 

 13 

 13 

 9 



15 

 15 



Successful. 



Do. 



Do. 

 Doubtful. 

 Negative. 



Do. 



Do. 



Do. 



Do. 

 Only one or 

 two spots. 

 Negative. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 

 Successful. 



Do. 

 Negative. 

 Successful. 



Do. 

 Negative. 



Do. 



Do. 



Do. 

 Successful. 

 Negative. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 

 Successful. 



Do. 



Do. 



Do. 

 Negative. 

 Successful. 

 Negative. 



Do. 



Do. 



Do. 



Do. 



Do. 

 Successful. 



Do. 



Do. 



